Author
United States Internal Revenue Service
411
Society of Photo-optical Instrumentation Engineers
239
United States Bureau of Mines
219
Massachusetts Institute of Technology
182
Geological Survey (U.S.)
148
United States Federal Aviation Administration
134
American National Standards Institute
113
United States National Aeronautics and Space Administration
102
R.S. Means Company
88
United States National Aeronautics and Space Administration. Technology Utilization Office
82
Institute of Electrical and Electronics Engineers
81
United States Department of Energy
77
American Society of Mechanical Engineers
76
United States Energy Information Administration
75
United States Environmental Protection Agency
72
United States Bureau of Reclamation
63
United States Army. Corps of Engineers
61
United States Federal Highway Administration
57
National Fire Protection Association
56
International Civil Aviation Organization
55
United States Office of Coal, Nuclear, Electric, and Alternate Fuels
54
United States Patent and Trademark Office
53
Engineers Joint Council Engineering Manpower Commission
50
United States National Highway Traffic Safety Administration
50
Society of Automotive Engineers
49
United States Environmental Protection Agency. Office of Air Quality Planning and Standards
49
Zagat Survey (Firm)
49
Massachusetts Institute of Technology Research Laboratory of Electronics
48
United States Patent Office
46
United States Federal Aviation Agency
45
American Society of Civil Engineers
44
United States Office of Energy Markets and End Use
44
Epstean Collection of Books on Photography and Its Applications in the Graphic Arts (Columbia University. Rare Book and Manuscript Library)
43
U.S. Nuclear Regulatory Commission
42
United States National Advisory Committee for Aeronautics
42
Canada Mines Branch
41
United States Civil Aeronautics Administration
41
United States Civil Aeronautics Board
41
National Research Council (U.S.) Transportation Research Board
40
National Restaurant Association (U.S.)
40
American Society for Testing and Materials
39
National Research Council (U.S.) Highway Research Board
39
American Society of Heating, Refrigerating and Air-Conditioning Engineers
36
American Society for Testing Materials
35
United States Bureau of the Census
35
United States Department of the Interior
35
United States Mine Safety and Health Administration
35
United States National Bureau of Standards
34
American Society for Engineering Education
33
United States Bureau of Public Roads
33
more ...