Saxena, R., & Nautiyal, S. (2001). Effect of Water Stress on the Chlorophyll Contents of the Leaves of <I>Pinus roxburghii</I> Sarg. of Different Seed-sources at Seedling Stage. Indian Forester, 127(9), 1033–1042. https://doi.org/10.36808/if/2001/v127i9/2978