The gastropod fossils from the Qomolangma Feng region. Zhumulangmafeng diqu kexue kaocha baogao 1966-1968. [A report of scientific expedition in the Mount Jolmo Lungma [Everest] Palaeontology. Fasc. 1., Science Press, Peking, 1975: 309-316. Chapter pagination: 129-238. 166 [Zoological Record Volume 117]