TY  - BOOK
AU  - Clausen,Knud E.
ED  - United States.
TI  - Yeild and quality of seed from yellow birch progenies
U1  - 581.467 
PY  - 1980///
CY  - Washington,D.C.
PB  - United States Department of Agriculture
KW  - Seeds
KW  - descriptive botany
ER  -