 | Handicapped Ozark Mountains Region. | (1) |
| Hardwoods. | (11) |
| Hardwoods Bibliography. | (1) |
| Hardwoods Diseases and pests Northeastern States. | (1) |
| Hardwoods Grading. | (2) |
| Hardwoods Lake States Pruning. | (1) |
| Hardwoods Northeastern States. | (1) |
| Hardwoods Thinning. | (1) |
| Hardwoods United States. | (2) |
| Harvesting time United States Statistics. | (1) |
| Hawks United States. | (1) |
| Hay Harvesting Labor productivity. | (1) |
| Hay Statistics. | (1) |
| Hay United States. | (1) |
| Heat Radiation and absorption. | (1) |
| Hemlock sawfly. | (1) |
| Herbicides. | (4) |
| Herbicides Costs. | (1) |
| Herbicides Economic aspects. | (1) |
| Herbicides Economic aspects Southern States. | (1) |
| Herbicides Toxicology. | (1) |
| Herbicides Toxicology Bibliography. | (1) |
| Heterobasidion annosum Control. | (1) |
| High school graduates Illinois. | (1) |
| High school students Montana Social conditions. | (1) |
| Hiking. | (1) |
| Histosols soils North Carolina. | (1) |
| Holly. | (1) |
| Home economics. | (1) |
| Home economics Accounting. | (1) |
| Home economics Northeastern States. | (1) |
| Honeybee Artificial insemination. | (1) |
| Honeybee Housing Heating and ventilation. | (1) |
| Honeybee Wintering. | (1) |
| Honeycombs. | (1) |
| Honey United States. | (1) |
| Honey United States Statistics. | (1) |
| Hops United States Statistics. | (1) |
| Horseflies Classification. | (1) |
| Horses. | (2) |
| Horses Breeding. | (1) |
| Horses Judging. | (1) |
| Horses Showing. | (1) |
| Horticultural machinery. | (2) |
| Horticulture Bibliography Catalogs. | (1) |
| Host-parasite relationships. | (3) |
| Host plants West (U.S.). | (1) |
| Hours of labor United States. | (1) |
| House buying. | (1) |
| House construction Handbooks, manuals, etc. | (1) |
| Household linens. | (1) |
| House painting. | (2) |
| House plants. | (1) |
| Housing. | (1) |
| Housing Connecticut. | (1) |
| Housing Rhode Island Case studies. | (1) |
| Housing Rhode Island Providence Metropolitan Area. | (1) |
| Housing, Rural. | (1) |
| Housing, Rural Northeastern States. | (1) |
| Housing, Rural Ozark Mountains Region Finance. | (1) |
| Housing, Rural South Carolina. | (1) |
| Housing, Rural Tennessee. | (1) |
| Housing, Rural United States. | (3) |
| Housing, Rural United States Statistics. | (2) |
| Housing United States. | (2) |
| Housing United States Statistics. | (1) |
| Humus North Carolina. | (1) |
| Hunters Nevada. | (1) |
| Hunting Arizona. | (1) |
| Hunting Nevada. | (1) |
| Hybrid corn Indiana. | (1) |
| Hybridization, Vegetable. | (1) |
| Hydrology. | (1) |
| Hydrology Computer programs Addresses, essays,lectures. | (1) |
| Hydrology, Forest Mississippi. | (1) |
| Hydrology Northeastern States. | (1) |
| Hydrology Southern States. | (1) |
| Hydrology Statistical methods Congresses. | (1) |
| Hydrology Tables. | (1) |
| Hydroponics. | (1) |
| Hymenoptera. | (1) |
| Hymenoptera Canada Catalogs. | (1) |
| Hymenoptera United States Catalogs. | (1) |
| Hyphantia cunea. | (1) |