TY  - BOOK
AU  - Simmonds,N.W.
TI  - Principles of crop improvement
SN  - 0582446309 :
U1  - 631.54 22
PY  - 1979///
CY  - London, New York
PB  - Longman
KW  - agronomy
KW  - Plant breeding
N1  - Includes indexes; Bibliography: p. 369-399
UR  - s.google.com.bd/books?id=-JYmSAAACAAJ&dq=principles+of+crop+improvement&hl=en&sa=X&ei=6bKjVMyXL86VuASdioKoCg&ved=0CB0Q6AEwAA
ER  -