TY  - BOOK
AU  - Piburn Michael D
TI  - Environment :  A human crisis   
T2  - Hayden American Values Challenge And Choices
SN  - 0810459051
U1  - U47, L4 
PY  - 1974///
CY  - New Jersey 
PB  - Hayden Book U S A     
KW  - Human Geography
N1  - Appendix p. 140-48
ER  -