Verma, V. P. S., & Pant, S. P. (1978). Performance of Slash Pine (<I>Pinus elliottii</I> Engelm.) Vis-a-vis Chirpine (<I>Pinus roxburghii</I> Sargent) in Respect of Oleoresin Yield at Dehra Dun. Indian Forester, 104(11), 768–771. https://doi.org/10.36808/if/1978/v104i11/11586