Singh, Pratap, and Arun Pratap Singh. “<I>Pinus gerardiana< I> (Chilgoza) Cone Borers of Kinnaur District in Himachal Pradesh”. Indian Forester, vol. 121, no. 8, Aug. 1995, pp. 728-34, doi:10.36808/if/1995/v121i8/7205.