TY  - BOOK
AU  - Chela,Kartar Singh
AU  - Bedi,Kishan Singh
AU  - Singh,Avtar
TI  - Agricultural operations the year round
U1  - 631.5 
PY  - 1973///
CY  - Ludhiana
PB  - Punjab Agricultural University
KW  - Agriculture, Technological change
ER  -