Roonwal, M. L., & Verma, S. C. (1971). Imago of the Wood-Termite <i>Heterotermes gertrudae</i> Roonwal (Rhinotermitidae : Heterotermitinae) from North-West Himalayas. Records of the Zoological Survey of India, 69(1-4), 241–247. https://doi.org/10.26515/rzsi/v69/i1-4/1971/161411