TY  - BOOK
AU  - Johnson,Willis H.
AU  - Steere,William Campbell
TI  - The environmental challenge,
SN  - 0030841852
AV  - QH541 .J65
U1  - 301.31 
PY  - 1974///]
CY  - New York
PB  - Holt, Rinehart and Winston
KW  - Ecology
KW  - Environmental protection
N1  - Includes bibliographies
ER  -