TY  - BOOK
AU  - Stebbins,Ledyard
TI  - Variation and evolution in plants / 
U1  - 581.15 STE  
PY  - 1957///.
CY  - New York : 
PB  - Columbia University Press, 
KW  - Evolution, Plants
KW  - Populations
KW  - Natural Selection
N1  - Index
ER  -