TY  - BOOK
AU  - Ashworth,William
TI  - The encyclopedia of environmental studies
SN  - 0816015317
PY  - 1991///
CY  - New York
PB  - Facts on File
KW  - Ecology
KW  - Dictionaries
KW  - Environmental protection
KW  - Environmental Protection
KW  - United State
N1  - Bibliography : p. 435-440; Includes index
ER  -