TY  - BOOK
AU  - Helfrich,Harold W.
TI  - The Environmental Crisis: : Man's Struggle to live with Himself
SN  - 0-300-01312-4
AV  - TD176.7.E47 
PY  - 1970///
CY  - New Haven
PB  - : Yale University
KW  - Pollution
KW  - Effect of nature on human beings
KW  - Natural resources
ER  -