TY  - BOOK
AU  - Greenwood,Ned H.
AU  - Edwards,J.M.B.
TI  - Human environments and natural systems
SN  - 0-878-72168-1
U1  - 301.31 GRE 
PY  - 1979///
CY  - North Scituate
PB  - Duxbury Press
KW  - Human ecology
KW  - Environmental protection
N1  - Includes bibliographical references and index
ER  -