Shahani, W. A., F. Kaiwen, and A. Memon. “IMPACT OF LASER LEVELING TECHNOLOGY ON WATER USE EFFICIENCY AND CROP PRODUCTIVITY IN THE COTTON –WHEAT CROPPING SYSTEM IN SINDH”. International Journal of Research -GRANTHAALAYAH, vol. 4, no. 2, Feb. 2016, pp. 220-31, doi:10.29121/granthaalayah.v4.i2.2016.2832.