TY  - BOOK
AU  - Stebbins G Ledyard
TI  - Variation and evolution in plants
T2  - Columbia biological series; 16
U1  - I:62, J0;6 
PY  - 1950///
CY  - Calcutta
PB  - Oxford Book        
KW  -  Plant genetics
KW  - Botany
ER  -