Environmental microthesaurus
Subtitle: a hierarchical list of indexing used by NTIS
By: National Technical Information Service, [Information Analysis Branch] & Environmental Protection Agency
Contributors: United States. Environmental Protection Agency
Publisher: U. S. Department of Commerce, National Technical Information Service
Published: 1977
Place of publication: [Springfield, Va.]
Language: eng
Number of pages: 100
Subjects: Subject headings; Environmental chemistry; Human ecology; Pollution; Thesauri
Notes: Cover title.

"PB-265261."

Microfiche (negative) Springfield, Va. : National Technical Information Service, 1977. -- 2 sheets ; 10.5 x 15 cm.