Funded by the National Science Foundation PEET program (Partnerships for Enhancing Expertise in Taxonomy)
Khan, M. A. 1957a. Sphaerularia bombi Duf. (Nematoda: Allantonematidae) infesting bumblebees and Sphaerularia hastata sp. nov. infesting bark beetles in Canada. Canadian Journal of Zoology 35(4):519-523.