Author
United States. Environmental Protection Agency. Office of Air Quality Planning and Standards
198
United States. Environmental Protection Agency
119
United States. National Air Pollution Control Administration
77
United States. Environmental Protection Agency. Office of Research and Development
65
Air Pollution Control Association
58
United States. Environmental Protection Agency. Emission Standards and Engineering Division
56
United Nations. Economic Commission for Europe
47
United States. General Accounting Office
43
United States. Division of Air Pollution
40
Industrial Environmental Research Laboratory (Cincinnati, Ohio)
39
ProQuest (Firm)
38
ProQuest Ebook Subscriptions
38
National Research Council (U.S.). Transportation Research Board
36
Organisation for Economic Co-operation and Development
35
Industrial Environmental Research Laboratory (Research Triangle Park, N.C.)
34
Air & Waste Management Association
33
National Council of the Paper Industry for Air and Stream Improvement (U.S.)
33
Air Pollution Technical Information Center
30
United States. Environmental Protection Agency. Office of Air Programs
29
Langley Research Center
28
United States. Federal Highway Administration
28
SpringerLink (Online service)
27
Air Pollution Control Association. Mid-Atlantic States Section
26
United States. Public Health Service
25
United States. Environmental Protection Agency. Emission Standards Division
24
United States. Environmental Protection Agency. Office of Air and Radiation
24
Environmental Sciences Research Laboratory
23
Organisation for Economic Co-operation and Development. Environment Directorate
23
United States. Bureau of Mines
23
American Chemical Society. Meeting
22
Environmental Monitoring and Support Laboratory (Las Vegas, Nev.)
20
Monsanto Research Corporation
20
Stern, Arthur C.
20
United States. Environmental Protection Agency. Monitoring and Data Analysis Division
20
World Health Organization
20
United States. Department of Energy
19
United States. Environmental Protection Agency. Air Pollution Control Office
18
United States. Environmental Protection Agency. Division of Stationary Source Enforcement
18
United States. National Aeronautics and Space Administration
17
American Institute of Chemical Engineers
16
Blackwood, T. R.
16
National Research Council (U.S.). Board on Environmental Studies and Toxicology
16
PEDCo Environmental, Inc
16
Air Pollution Control Association. Technical Council
15
National Center for Air Pollution Control (U.S.)
14
Research Triangle Institute
14
United Nations Environment Programme
14
United States. National Aeronautics and Space Administration. Scientific and Technical Information Branch
14
Chalekode, P. K.
13
Environmental Monitoring Systems Laboratory (Research Triangle Park, N.C.)
13
more ...