TY  - BOOK
AU  - Mattoon,Wilbur R.
TI  - Forest trees and forest regions of the United States
T2  - Miscellaneous publication / United States Department of Agriculture
AV  - SD143 .M38 1936
PY  - 1936///
CY  - Washington, D.C.
PB  - U.S. Dept. of Agriculture
KW  - Forests and forestry
KW  - United States
KW  - Trees
KW  - Classification
N1  - Caption title; Contribution from Forest Service; "Publications on forest trees": p. 52-53
ER  -