TY  - BOOK
AU  - N.C. Singhal
TI  - Hybrid Seed Production in Field Crops Principles & Practices 
SN  - 978-272-3015-4
U1  - 631.521 SIN-H 
CY  - Kalyani Publisher, B-1/1292, Rajinder Nagar, Ludhiana 
ER  -