VERMA, I. J., V.K. SONI, N.D. SABALE, and A.L. KOPPAR. 2012. “Spatial Variability of Annual and Monthly Potential Evapotranspiration (PET) over India”. MAUSAM 63 (4):581-86. https://doi.org/10.54302/mausam.v63i4.413.