TY  - BOOK
AU  - _Daniel chiras D 
TI  - _Natural Resource conservation an ecological Approach[5th ed.] Oliver Owen S 
SN  - 00239011-x 
AV  - S 938 .O87 1990  
CY  - New York Macmillan 1990 
KW  - _Natural Resource
N1  - includes index
ER  -