Author
Geological Survey (U.S.)
36
Society of Photo-optical Instrumentation Engineers
28
North Atlantic Treaty Organization. Scientific Affairs Division
27
Ontario. Ministry of Northern Development and Mines
18
World Meteorological Organization
13
Ontario. Ministry of Natural Resources
12
United States. National Bureau of Standards
10
American Mathematical Society
9
National Institute of Standards and Technology (U.S.)
9
Newton, Isaac, 1642-1727
8
American Chemical Society. Meeting
7
National Climatic Center
7
National Climatic Data Center (U.S.)
7
New York Academy of Sciences
7
American Institute of Physics
6
Gribbin, John, 1946-
6
Asimov, Isaac, 1920-1992
5
British Computer Society
5
Geological Survey of Canada
5
International Atomic Energy Agency
5
International Council of Scientific Unions
5
International Geological Congress
5
Ontario. Department of Mines
5
United Nations Environment Programme
5
United States. National Aeronautics and Space Administration
5
WGBH Video (Firm)
5
American Association for the Advancement of Science
4
American Society for Testing and Materials
4
Association for Computing Machinery
4
Channel Four (Great Britain)
4
Dodge, Yadolah, 1944-
4
Geological Association of Canada
4
Geological Society of America
4
Goddard Space Flight Center
4
Illinois State Geological Survey
4
Institute of Physics (Great Britain)
4
International Union of Pure and Applied Physics
4
MacDougal, Daniel Trembly, 1865-1958
4
Rand Corporation
4
Tyndall, John, 1820-1893
4
U.S. Fish and Wildlife Service
4
Unesco
4
Utah Geological Survey
4
WGBH (Television station : Boston, Mass.)
4
World Climate Research Programme
4
American Association for Artificial Intelligence
3
American Astronomical Society
3
American Chemical Society. Division of Polymer Chemistry
3
American Geological Institute
3
American Meteorological Society
3
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