Verma, V.P.S. and 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 (Nov. 1978), 768–771. DOI:https://doi.org/10.36808/if/1978/v104i11/11586.