Bhatnagar, H. P., and K. K. Talwar. “Photoperiodic Response of Growth of <I>Pinus caribaea< I> Seedlings: I Effect on Stem Height and Diameter and Tracheid Characters”. Indian Forester, vol. 104, no. 3, Mar. 1978, pp. 212-26, doi:10.36808/if/1978/v104i3/11438.