Subject
- Land use--Planning1
- Landowners1
- Landscape architectural surveying1
- Law and legislation1
- Low-income housing1
- Marine mammals1
- Marine plants1
- Maritime boundaries1
- Medically underserved areas1
- Metamorphism (Geology)1
- Military1
- Military Base1
- Military parks1
- Milk yield1
- Mountains1
- National Wetlands Inventory (U.S.)1
- National parks and reserves1
- Natural Resources1
- Natural areas1
- Natural gas1