Jana, J C, et al. “Effect of Planting Geometry and Nitrogen Levels on Crop Growth, Fruit Yield and Quality in Okra Grown During Early Winter in Terai Zone of West Bengal”. Journal of Horticultural Sciences, vol. 5, no. 1, June 2010, pp. 30-33, https://doi.org/10.24154/jhs.v5i1.488.