AHUJA, S L, et al. “Effect of Intra Row Spacings on Estimates of Phenotypic and Genotypic Correlation Coefficients in Cotton (Gossypium Arboreum)”. The Indian Journal of Agricultural Sciences, vol. 86, no. 2, Feb. 2016, pp. 173–7, https://doi.org/10.56093/ijas.v86i2.55876.