TY  - BOOK
AU  - The Interntional Seed Testing Association
TI  - Handbook Of Pure Seed Definitions: With Illustrations
SN  - 3-906549-07-0
U1  - 631 IST/HA 
PY  - 1997///
CY  - Jodhpur
PB  - Scientific Publishers
KW  - introduction
KW  - structures classification
ER  -