 | Quails New Mexico. | (1) |
| Questionnaires Bibliography. | (1) |
| Rabbits. | (2) |
| Raccoons. | (1) |
| Radioactive decontamination. | (1) |
| Radioactive pollution of soils. | (1) |
| Railroads United States Freight-cars. | (1) |
| Railroads United States Rates. | (1) |
| Rain and rainfall Great Plains. | (1) |
| Rain and rainfall Iowa. | (1) |
| Rain-making Great Plains. | (1) |
| Rain-water (Water-supply) | (1) |
| Raisins Fumigation. | (1) |
| Raisins Storage Diseases and injuries. | (2) |
| Ranches Colorado. | (1) |
| Ranches New Mexico. | (1) |
| Ranches Northwestern States. | (1) |
| Ranches Southwestern States Statistics. | (1) |
| Rangelands. | (2) |
| Rangelands Research. | (2) |
| Range management. | (1) |
| Range management Arizona. | (1) |
| Range management California. | (1) |
| Range management Colorado. | (1) |
| Range management Economic aspects Colorado. | (1) |
| Range management Southern States Bibliography. | (2) |
| Range management United States. | (1) |
| Range management United States Costs. | (1) |
| Rare books Bibliography Catalogs. | (1) |
| Raspberries. | (1) |
| Raspberries Diseases and pests. | (1) |
| Rate of return. | (1) |
| Rats Control. | (1) |
| Rats Physiology. | (1) |
| Real property tax Georgia. | (1) |
| Real property tax United States. | (1) |
| Real property tax United States States. | (1) |
| Real property Valuation Northeastern States. cm | (1) |
| Reclamation of land New Mexico. | (1) |
| Reclamation of land Wyoming. | (1) |
| Recreation areas Illinois. | (1) |
| Recreation areas New Hampshire. | (1) |
| Recreation areas North Carolina. | (1) |
| Red alder. | (1) |
| Red crabs. | (1) |
| Red maple. | (1) |
| Red oak. | (1) |
| Red pine Disease and pests Lake States. | (1) |
| Red pine Diseases and pests Identification. | (1) |
| Red pine Michigan Thinning. | (1) |
| Red pine Thinning. | (1) |
| Red spruce. Nutrition. | (1) |
| Reforestation. | (2) |
| Reforestation Kansas. | (1) |
| Reforestation Lake States. | (1) |
| Reforestation Nebraska. | (1) |
| Reforestation Southern States. | (2) |
| Reforestation Southwestern States. | (1) |
| Reforestation Southwest, New. | (1) |
| Reforestation Wisconsin. | (1) |
| Refrigerated trucks. | (2) |
| Refrigeration and refrigerating machinery. | (1) |
| Refrigerator-cars. | (2) |
| Refuse and refuse disposal Georgia. | (1) |
| Regional economic disparities United States. | (1) |
| Regional planning New Hampshire. | (1) |
| Regional planning United States. | (2) |
| Regional planning United States Bibliography. | (1) |
| Regional planning United States Mathematical models. | (1) |
| Regional planning Vermont. | (1) |
| Regional planning Washington Metropolitan Area. | (1) |
| Regression analysis. | (1) |
| Renewal theory. | (1) |
| Repairing Amateurs' manuals. | (2) |
| Research, Industrial United States. | (1) |
| Reservoir sedimentation. | (1) |
| Reservoir sedimentation United States. | (1) |
| Reservoirs United States Statistics. | (1) |
| Residential mobility Connecticut. | (1) |
| Restaurant management United States. | (1) |
| Restaurants, lunch rooms, etc. United States. | (2) |
| Restaurants, lunch rooms, etc. United States Employees. | (1) |
| Retirement income Southern States. | (1) |
| Revegetation Wyoming. | (1) |
| Revenue North Carolina. | (1) |
| Rhubarb Storage. | (1) |
| Rice. | (1) |
| Rice Asia Varieties. | (1) |
| Rice California Costs Statistics. | (1) |
| Rice California Machinery Statistics. | (1) |
| Rice Economic aspects Southern States. | (1) |
| Rice Louisiana Drying. | (1) |
| Rice Louisiana Storage. | (1) |
| Rice Marketing Statistics. | (1) |
| Rice Southern States Milling. | (1) |
| Rice Southern States Milling Costs. | (1) |
| Rice Storage Diseases and pests Control. | (1) |
| Rice Texas Drying. | (1) |
| Rice Texas Storage. | (1) |
| Rice trade Brazil. | (1) |
| Rice trade Southern States. cm | (1) |
| Rice trade United States. | (1) |
| Rice trade United States Statistics. | (1) |
| Rice United States. | (1) |
| Rice United States Marketing. | (1) |
| Rice Varieties. | (1) |
| Rice Weed control Southern States. | (1) |
| Riparian flora Bibliography. | (1) |
| River carpsucker. | (1) |
| Roads Economic aspects United States. | (1) |
| Roads Guard fences. | (1) |
| Roads Guard fences Testing. | (1) |
| Roadside improvement. | (1) |
| Roadside improvement Bibliography. | (1) |
| Roadside improvement Michigan. | (1) |
| Roadside improvement New Jersey. | (1) |
| Rodents. | (1) |
| Roofing. | (1) |
| Root-crops Wounds and injuries. | (1) |
| Ruffed grouse. | (1) |
| Ruminants Parasites West (U.S.) | (1) |
| Runoff. | (1) |
| Rural development. | (1) |
| Rural development North Carolina. | (1) |
| Rural development Ozark Mountains. | (1) |
| Rural development South Carolina Summerville. | (1) |
| Rural development Statistics. | (1) |
| Rural development United States. | (1) |
| Rural development United States Mathematical models. | (1) |
| Rural electrification United States. | (1) |
| Rural electrification United States Bibliography. | (1) |
| Rural families Southern States. | (1) |
| Rural health services United States. | (2) |
| Rural health services Washington (State) | (1) |
| Rural health United States. | (1) |
| Rural poor Middle West. | (2) |
| Rural poor Mississippi River Valley. | (2) |
| Rural poor South Carolina. | (2) |
| Rural poor Southern States. | (1) |
| Rural poor United States. | (2) |
| Rural poor United States Statistics. | (1) |
| Rural-urban migration Georgia. | (1) |
| Rural-urban migration New Hampshire. | (1) |
| Rural-urban migration United States. | (2) |
| Rural youth Illinois. | (1) |
| Rural youth United States. | (1) |
| Rusts (Fungi) Identification. | (1) |