National historic landmarks :
a preservation program of the National Park Service : supplement to the 1976 listings.

APA Citation

Historic Sites Survey (U.S.). (1977). National historic landmarks: a preservation program of the National Park Service : supplement to the 1976 listings. Washington: Dept. of the Interior, National Park Service, Office of Archeology and Historic Preservation, Historic Sites Survey.

MLA Citation

Historic Sites Survey (U.S.). National Historic Landmarks: a Preservation Program of the National Park Service : Supplement to the 1976 Listings. Washington: Dept. of the Interior, National Park Service, Office of Archeology and Historic Preservation, Historic Sites Survey, 1977.