Columbia subject headings:
National Museum of American History (U.S.)--Photograph collections.
Harvard subject headings:
National Air and Space Museum--Photograph collections.
National Museum of American History (U.S.)--Photograph collections.
National Museum of Natural History (U.S.)--Photograph collections.
National Zoological Park (U.S.)
Photograph collections--Washington (D.C.)
Smithsonian Astrophysical Observatory--Photograph collections.
Smithsonian Institution--Photograph collections.
Smithsonian Tropical Research Institute--Photograph collections.
Princeton subject headings:
Museum of Natural History (U.S.)--Photograph collections.
National Museum of American History (U.S.)--Photograph collections.
National Zoological Park (U.S.)--Photograph collections.
Smithsonian Astrophysical Observatory--Photograph collections.
Smithsonian Tropical Research Institute--Photograph collections.