TY  - BOOK
AU  - Ashworth,William
TI  - The encyclopedia of environmental studies
SN  - 0816015317 (hardbound : acidfree paper) :
AV  - TD9 .A84 1991
U1  - 333.7/0973 20
PY  - 1991///
CY  - New York
PB  - Facts on File
KW  - Environmental engineering
KW  - Encyclopedias
KW  - Environmental protection
KW  - Pollution
KW  - Ecology
N1  - Includes bibliographical references (p. 435-440) and index
ER  -