[1]
O. N. Kaul, J. D. S. Negi, D. C. Sharma, and P. B. L. Shrivastava, “Organic Matter and Plant Nutrient Distribution in a Chir (<I>Pinus roxburghii</I>) Plantation”, Indian Forester, vol. 107, no. 2, pp. 86–94, Feb. 1981.