TY  - BOOK
AU  - Briggs,D.
AU  - Walters,S.M.
TI  - Plant variation and evolution
T2  - World university library
AV  - QH406 .B68
U1  - 581.1/5 
PY  - 1969///]
CY  - New York
PB  - McGraw-Hill
KW  - Botany
KW  - Variation
KW  - Local
KW  - Plants
KW  - Evolution
N1  - Bibliography: p. 240-252
ER  -