American Society of Landscape Architects. With the online Landscape Architect Firm Finder, seekers can now access more than 10,000 landscape architects by geographic location, metropolitan service area, or firm name.
Parks directory of the United States, Darren L. Smith, Kay Gill, eds. 5th ed. Detroit, MI: Omnigraphics, 2007.
Lists more than 5,270 state and national parks, urban prks, wildlife refuges, and more. Each listing includes a brief history of the park, its size and available facilties, as well as available activities and special features.