TY  - BOOK
AU  - Ayala Francisco J Ed.
AU  -  Clegg Michael T Ed.
AU  -  Fitch Walter M Ed.
TI  - Variation and evolution in plants and microorganisms : Towards a new synthesis 50 years after stebbins
U1  - I:66, P0 
PY  - 2000///
CY  - Washington
PB  - National Academy Press     
ER  -