TY  - BOOK
AU  - Derfman,R.
AU  - Derfman,Nancy S.
TI  - Economics of the environment
U1  - 301.31 
PY  - 1977///
CY  - N.Y.
PB  - W.W. Nerton
KW  - Sociology
KW  - Economics
KW  - Environment
ER  -