Impacts of air pollution on national park units hearings before the Subcommittee on National Parks and Recreation of the Committee on Interior and Insular Affairs, House of Representatives, Ninety-ninth Congress, first session ... hearings held in Washington, DC, May 20 and 21, 1985. - United States. (U.S. G.P.O., 1986)
"Serial no. 99-10."
CIS Microfiche Accession Numbers: CIS 86 H441-15
Includes bibliographies.
Microfiche.[Bethesda, Md.] :Congressional Information Service,198611 X 15 cm.
[microform]
Keywords: Air / Pollution / United States. / http://id.loc.gov/authorities/subjects/sh2008117574; National parks and reserves / United States. / http://id.loc.gov/authorities/subjects/sh85090103