Subject
- Land use--Planning1
- Landowners1
- Landscape architectural surveying1
- Law and legislation1
- Light sources1
- Low-income housing1
- Magnesium1
- Magnesium compounds1
- Manganese mines and mining1
- Maps1
- Marine mammals1
- Mica1
- Mica mines and mining1
- Military1
- Military parks1
- Mines and mineral resources--United States1
- Mining operations1
- Mountains1
- Multibeam mapping1
- National Wetlands Inventory (U.S.)1