Bhardwaj, S. D., B. S. Singh, and M. P. Gupta. 1991. “Effect of Different Levels of N, P, K on the Growth of <I>Robinia pseudacacia< I> Linn. Seedlings”. Indian Forester 117 (7):568-72. https://doi.org/10.36808/if/1991/v117i7/8658.