Author
United States. Bureau of Mines
182
Geological Survey (U.S.)
79
United States. Federal Aviation Administration
72
United States. Department of Energy
64
R.S. Means Company
56
United States. National Aeronautics and Space Administration
54
United States. Environmental Protection Agency
48
United States. Energy Information Administration
47
United States. Internal Revenue Service
44
United States. Patent and Trademark Office
40
Institute of Electrical and Electronics Engineers
37
Society of Automotive Engineers
36
American Society for Testing and Materials
35
United States. Army. Corps of Engineers
34
United States. Bureau of Reclamation
33
American Society of Mechanical Engineers
32
United States. Department of Energy. Office of Energy Technology
32
United States. Federal Highway Administration
31
American Society of Heating, Refrigerating and Air-Conditioning Engineers
30
United States. Environmental Protection Agency. Office of Air Quality Planning and Standards
30
National Research Council (U.S.). Highway Research Board
29
United States. National Highway Traffic Safety Administration
29
United States. Mine Safety and Health Administration
28
National Research Council (U.S.). Transportation Research Board
27
New Jersey. Department of Environmental Protection
27
United States. Office of Energy Markets and End Use
27
American Society for Testing Materials
25
National Institute of Standards and Technology (U.S.)
25
United States. Environmental Protection Agency. Office of Solid Waste and Emergency Response
25
ScienceDirect (Online service)
24
Society of Photo-optical Instrumentation Engineers
24
United States. Department of Energy. Office of the Assistant Secretary for Environment
24
United States. Office of Coal, Nuclear, Electric, and Alternate Fuels
24
American Society of Civil Engineers
22
EBSCO Publishing (Firm)
22
National Fire Protection Association
22
Temple University. School of Law
22
American Society for Metals
20
Society of Photo-Optical Instrumentation Engineers
20
United States. Patent Office
20
American Institute of Chemical Engineers
19
United States. Bureau of the Census
19
United States. Energy Information Administration. Office of Oil and Gas
19
Robert Snow Means Company
18
United States. Civil Aeronautics Board
18
United States. Federal Aviation Agency
18
United States. National Aeronautics and Space Administration. Scientific and Technical Information Branch
18
United States. National Technical Information Service
18
e-libro, Corp
18
Gale Group
17
more ...