Author/Creator
- Geological Survey (U.S.)91
- Library of Congress79
- Norman Ross Publishing71
- Rossiĭskai︠a︡ nat︠s︡ionalʹnai︠a︡ biblioteka. Otdel literatury na nat︠s︡ionalʹnykh i︠a︡zykakh69
- Griffin, Appleton P. C. (Appleton Prentiss Clark), 1852-192640
- United States32
- United States. National Bureau of Standards28
- Smithsonian Institution. Office of the Secretary27
- National Institute of Standards and Technology (U.S.)26
- United States. Administration on Aging25
- United States. National Aeronautics and Space Administration. Scientific and Technical Information Branch25
- Pacific Northwest Research Station (Portland, Or.)17
- National Diabetes Information Clearinghouse (U.S.)16
- Research Publications, inc16
- United States. War Department. Library16
- Tuttle, Marie H.14
- U.S. Fish and Wildlife Service14
- United States. National Highway Traffic Safety Administration14
- Langley Research Center13
- Air Force Human Resources Laboratory12