Author
United States. Environmental Protection Agency
356
Organisation for Economic Co-operation and Development
242
United States. General Accounting Office
188
United States. Congress. Senate. Committee on Environment and Public Works
173
United States. Environmental Protection Agency. Office of Research and Development
167
United Nations Environment Programme
148
ProQuest (Firm)
141
ProQuest Ebook Subscriptions
137
GPO MARCIVE
101
Library of Congress. Congressional Research Service
92
United States. Environmental Protection Agency. Office of Solid Waste and Emergency Response
87
United Nations. Economic Commission for Europe. Committee on Environmental Policy
72
United States. Environmental Protection Agency. Office of the Inspector General
66
United States. Department of State
65
SpringerLink (Online service)
60
United States. Congress. House. Committee on Transportation and Infrastructure. Subcommittee on Water Resources and Environment
59
Council on Environmental Quality (U.S.)
58
Geological Survey (U.S.)
54
United States
52
Pennsylvania. Department of Environmental Protection
40
United States. Environmental Protection Agency. Office of Administration and Resources Management
40
United States. Environmental Protection Agency. Office of the Administrator
40
United States. General Accounting Office. RCED
40
United Nations. Economic Commission for Europe
37
United States. Environmental Protection Agency. Office of Water
37
United States. Farm Service Agency
36
International Union for Conservation of Nature and Natural Resources
34
Pennsylvania. Department of Environmental Resources
34
United States. Environmental Protection Agency. Office of the Chief Financial Officer
32
Pennsylvania Bar Institute
31
Gore, Al, 1948-
30
United States. Forest Service
30
World Bank
30
National Risk Management Research Laboratory (U.S.)
29
New Jersey. Department of Environmental Protection
29
United States. Environmental Protection Agency. Office of Policy, Planning, and Evaluation
29
United States. Congress. House. Committee on Resources
27
Canada. Environment Canada
26
European Environment Agency
26
JSTOR
26
United States. Government Accountability Office
26
Center for Environmental Research Information (U.S.)
25
PALCI EBSCO books
25
United States. Congress. House. Committee on Energy and Commerce. Subcommittee on Energy and Power
25
U.S. Fish and Wildlife Service
24
United States. Congress. House. Committee on Energy and Commerce. Subcommittee on Environment and the Economy
24
United States. Environmental Protection Agency. Enforcement and Compliance Assurance
24
United States. Environmental Protection Agency. Library Systems Branch
24
Miller, G. Tyler (George Tyler), 1931-
23
United States. Federal Highway Administration
23
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