TY  - BOOK
AU  - Johnson,Willis Hugh
AU  - Steere,William Campbell
TI  - The environmental challenge
SN  - 0030841852
PY  - 1974///
CY  - Rinehart and Winston, New York
PB  - Holt
KW  - Ecology
KW  - Environmental protection
N1  - Includes bibliographies
ER  -