 | Labor costs. | (1) |
| Labor mobility Michigan. | (1) |
| Labor mobility New Mexico. | (2) |
| Labor mobility United States Case studies. | (1) |
| Labor supply Appalachian Region. | (1) |
| Labor supply Connecticut. | (2) |
| Labor supply Georgia. | (2) |
| Labor supply Northeastern States. | (2) |
| Labor supply Oklahoma. | (1) |
| Labor supply Ozark Mountains Region. | (2) |
| Labor supply Ozark Mountains Region Statistics. | (1) |
| Labor supply United States. | (1) |
| Labor supply United States Statistics. | (1) |
| Labor turnover United States Case studies. | (1) |
| Ladybirds Food. | (1) |
| Ladybirds Maine Aroostook County Identification. | (1) |
| Lakes Minnesota. | (2) |
| Lakes Nevada Recreational use. | (1) |
| Lamb (Meat) | (1) |
| Lambs United States Statistics. | (2) |
| Land reform India. | (1) |
| Landscape. | (1) |
| Landscape architecture. | (2) |
| Landscape gardening. | (1) |
| Landscape protection United States. | (1) |
| Landscape protection United States Bibliography. | (1) |
| Land settlement United States. | (1) |
| Land tenure Law and legislation India. | (1) |
| Land tenure United States. | (2) |
| Land use. | (1) |
| Land use Classification. | (1) |
| Land use Connecticut. | (1) |
| Land use Mississippi River Valley. | (1) |
| Land use New Mexico Catron County Classification. | (1) |
| Land use New Mexico Classification. | (2) |
| Land use New Mexico Colfax County Classification. | (1) |
| Land use New Mexico Grant County Classification. | (1) |
| Land use New Mexico Las Cruces. | (1) |
| Land use New Mexico Lea County. | (1) |
| Land use New Mexico McKinley County Classification. | (1) |
| Land use New Mexico Mora County Classification. | (1) |
| Land use New Mexico Otero County Classification. | (1) |
| Land use New Mexico Rio Arriba County Classification. | (1) |
| Land use New Mexico San Juan County Classification. | (1) |
| Land use New Mexico San Miguel County Classification. | (1) |
| Land use New Mexico Sierra County Classification. | (1) |
| Land use New Mexico Socorro County Classification. | (1) |
| Land use New Mexico Taos County Classification. | (1) |
| Land use New Mexico Union County Classification. | (1) |
| Land use New Mexico Valencia County Classification. | (1) |
| Land use, Rural. | (2) |
| Land use, Rural United States. | (2) |
| Land use, Rural United States Bibliography. | (2) |
| Land use Texas. | (1) |
| Land use United States. | (7) |
| Land use Washington Metropolitan Area. | (1) |
| Land use White River Valley (Ark. and Mo.) | (1) |
| Land value taxation United States. | (1) |
| Lawns Weed control. | (2) |
| Leafhoppers. | (1) |
| Least squares. | (1) |
| Leather industry and trade United States. | (1) |
| Legume inoculation. | (1) |
| Legumes. | (1) |
| Legumes Kentucky. | (1) |
| Lepidoptera Maine Classification. | (1) |
| Lepidoptera North America Classification. | (1) |
| Lespedeza. | (2) |
| Lettuce. | (1) |
| Lettuce mosaic disease. | (1) |
| Lettuce Quality. | (2) |
| Lettuce Storage. | (1) |
| Lettuce Transportation. | (2) |
| Lettuce Varieties. | (1) |
| Life zones Puerto Rico. | (1) |
| Life zones Virgin Islands of the United States. | (1) |
| Lightning-conductors. | (1) |
| Lignin. | (1) |
| Lima bean. | (1) |
| Limnology New York (State) Cayuga Lake. | (1) |
| Linters. | (3) |
| Liriodendron tulipifera. | (2) |
| Liriodendron tulipifera Diseases and pests. | (1) |
| Liriodendron tulipifera Growth. | (1) |
| Livestock Congresses. | (1) |
| Livestock Diseases. | (1) |
| Livestock Economic aspects New Mexico. | (1) |
| Livestock Feeding and feeds Statistics. | (1) |
| Livestock Ireland. | (1) |
| Livestock Kansas Marketing. | (2) |
| Livestock Marketing Bibliography. | (1) |
| Livestock North Dakota Statistics. | (1) |
| Livestock poisoning plants Middle West. | (1) |
| Livestock poisoning plants West (U.S.) | (1) |
| Livestock Prices West Virginia. | (1) |
| Livestock Tennessee Marketing. | (1) |
| Livestock United States Marketing. | (1) |
| Livestock West Virginia Marketing. | (1) |
| Loans United States. | (2) |
| Loblolly pine. | (1) |
| Loblolly-pine. cn | (1) |
| Loblolly pine Seeds. | (1) |
| Lobster fisheries Economic aspects New England. | (1) |
| Local finance Kentucky Case studies. | (1) |
| Local finance Middle West. | (1) |
| Local government Michigan. | (1) |
| Locusts Control United States. | (2) |
| Locusts Montana. | (1) |
| Locusts Parasites. | (1) |
| Lodgepole pine. | (3) |
| Lodgepole pine Diseases and pests. | (1) |
| Logging Costs. | (1) |
| Logging Environmental aspects Northwest, Pacific Abstracts. | (1) |
| Logging Illinois Shawnee National Forest. | (1) |
| Logging Indiana. | (1) |
| Logging Middle West Costs. cm | (1) |
| Logging, Skyline. | (1) |
| Logging, Skyline Handbooks, manuals, etc. | (1) |
| Log transportation Handbooks, manuals, etc. | (1) |
| Longleaf pine. | (1) |
| Longleaf pine Bibliography. | (1) |
| Longleaf pine Diseases and pests Florida. | (1) |
| Longleaf pine Georgia. | (1) |
| Long-range weather forecasts Oklahoma. | (1) |
| Lotus. | (1) |
| Louisiana irises. | (1) |
| Lumber Drying. | (2) |
| Lumber Grading. | (4) |
| Lumbering Cost control. | (2) |
| Lumbering Economic aspects United States. | (1) |
| Lumbering Machinery. | (1) |
| Lumbering Montana Costs. | (1) |
| Lumber Statistics. | (1) |
| Lumber trade Connecticut New Haven. | (1) |
| Lumber trade New Hampshire. | (1) |
| Lumber trade Northwest, Pacific. | (1) |
| Lumber trade United States. | (1) |
| Lysimeter. | (2) |