Bhatnagar, H.P. and Talwar, K.K. 1978. Studies on the Effect of Growth Regulators on Growth and Tracheid Characters of <I>Pinus caribaea</I> Seedlings. Indian Forester. 104, 5 (May 1978), 333–354. DOI:https://doi.org/10.36808/if/1978/v104i5/11465.