TY  - BOOK
AU  - Stebbins,G.Ledyard
TI  - Variation and evolution in plants
U1  - 581.3 STE/V 
PY  - 1950///
CY  - . - New York
PB  - : Columbia University Press
KW  - Plants
N1  - "Works cited": p. [563]-622
ER  -