Tavdgiridze, Gultamze, and Sh. Putkaradze. “Effect of Nitrogen Fertilizer Type on Polarity Coefficient of Mandarin Trees”. Subtropical Crops, no. 4 (July 29, 1991): 71–73. Accessed November 23, 2024. https://journals.4science.ge/index.php/jsc/article/view/2891.