TY  - BOOK
AU  - Russwurm,Lorne H.
TI  - Man's natural environment:  : a systems approach
SN  - 08787207077
AV  - GB55.R87 
PY  - 1974///
CY  - Massachusetts : 
PB  - Duxbury Press
KW  - Physical geography
KW  -  Environmental protection
N1  - Includes bibliographies
ER  -