TY  - BOOK
AU  - Dyrness,C.T.
TI  - Research natural area needs in the Pacific Northwest: a contribution to land-use planning
U1  - 333.7 
PY  - 1975///
CY  - Estados Unidos
PB  - U. S. Department of Agriculture
KW  - Recursos naturales
KW  - conservación
ER  -