Kumar, Dinesh, Sujan Singh, H. S. Thapar, and B. M. Misra. 1968. “A Preliminary Note on Mycorrhiza Formation in Chir Pine on Sand at Different N, P, K Levels”. Indian Forester 94 (3):247-50. https://doi.org/10.36808/if/1968/v94i3/25849.