TY  - BOOK
AU  - Gurhemdeep singh
TI  - A comparative economic anal analysis of protected and open field cultivation of tomato in punjab
PY  - 2016///
CY  - Ludhiana
PB  - PAU
KW  - low tonnel
KW  - cost and return
KW  - productivity
N1  - In thesis Section
ER  -