Author
Safari Books Online
419
United States. Federal Aviation Administration
105
United States. Department of the Army
71
AccessEngineering
67
United States. Federal Highway Administration
59
United States. Naval Facilities Engineering Command
57
Center for Environmental Research Information (U.S.)
46
SpringerLink (Online service)
38
Rosengarten Family Fund
34
United States. Environmental Protection Agency. Office of Solid Waste and Emergency Response
33
Culinary Collection (University of Pennsylvania)
31
United States. Environmental Protection Agency
31
National Fire Protection Association
30
National Mine Health and Safety Academy
30
United States. Environmental Protection Agency. Office of Research and Development
30
Busch, David D.
29
Alumni and Friends Memorial Book Fund
27
IGI InfoSci
27
Thumann, Albert
27
American Society of Heating, Refrigerating and Air-Conditioning Engineers
26
United States. National Aeronautics and Space Administration
26
Risk Reduction Engineering Laboratory (U.S.)
25
American Association of State Highway and Transportation Officials
23
Turner, Wayne C., 1942-
23
Hicks, Tyler Gregory, 1921-
22
National Research Council (U.S.). Transportation Research Board
22
United States. Environmental Protection Agency. Office of Emergency and Remedial Response
21
Chef Fritz Blank Culinary Archive and Library (University of Pennsylvania)
20
Harper, Charles A.
20
Kutz, Myer
20
Lewis, Richard J., Sr., 1939-2018
20
United States. Department of Energy
20
United States. Environmental Protection Agency. Office of Water
20
United States. Bureau of Reclamation
19
United States. Mine Safety and Health Administration
19
J.J. Keller & Associates
18
Naval Education and Training Program Management Support Activity (U.S.)
18
PALCI EBSCO books
18
United States. Flight Standards Service
18
United States. National Highway Traffic Safety Administration
18
United States. Patent and Trademark Office
18
Black & Decker Corporation (Towson, Md.)
17
Time-Life Books
17
United States. Department of the Air Force
17
United States. Environmental Protection Agency. Office of Air Quality Planning and Standards
17
United States. Occupational Safety and Health Administration
17
Whitaker, Jerry C.
17
Gotham Book Mart Collection (University of Pennsylvania)
16
Sax, N. Irving (Newton Irving)
16
ASM International. Handbook Committee
15
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