Tilton, Beverly E. creator author. Bruce, Robert M. Dr author. United States Environmental Protection Agency. Environmental Criteria and Assessment Office (Research Triangle Park, N.C.), issuing body. text bibliography dcu 1980 monographic eng 1 online resource ([310] pages) : illustrations by Beverly E. Tilton and Robert M. Bruce. Title from title screen (viewed Sept. 22, 2016). "August 1980." "EPA-600/8-80-045." "Special series." CRDP Project record. Preprint Includes bibliographical references. n-us--- Air Pollution Law and legislation United States EP 1.2:H 99/16 EP 1.2:H 99/16 Tilton, Beverly E. (OCoLC)8477737 http://purl.fdlp.gov/GPO/gpo72683 http://purl.fdlp.gov/GPO/gpo72683 GPO 160922 20170208053811.0 ocn958937586 eng