Guide to research in air pollution / compiled by Center for Air Environment Studies of the Pennsylvania State University.
ISSN
0533-9839
Published
Raleigh, N.C. : U.S. Dept. of Health, Education, and Welfare, Public Health Service, Environmental Health Service, National Air Pollution Control Administration : Washington, D.C. : For sale by the Supt. of Docs., U.S. G.P.O.,