TY  - BOOK
AU  - 
TI  - Human environments and natural systems 
SN  - 0878721681
AV  - GF41 G61
PY  - 1979///
CY  - North Scituate, Mass.
PB  - Duxbury Press
KW  -  
KW  - Human ecology
KW  - Environmental protection
KW  - Land use
N1  - Includes biliographies and index
ER  -