TY  - BOOK
ED  - United States.
TI  - Silvicultural systems for the major forest types of the United States
U1  - 634.950973 
PY  - 1973///
CY  - Washington, D. C.
PB  - U. S. Forest Service ; United States Government Printing Office
KW  - Forests and forestry
KW  - United States
KW  - Silvicultural systems
N1  - a Includes bibliographies
ER  -