Verma, V. P. S.; Pant, S. P. 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 1978, 104, 768-771.