R.I. Zlotin and K.S. Khodashova ; English language edition edited by Norman R. French ; translated by William Lewus and W.E. GrantDowden, Hutchison & Rossc1980
mapping carried out by James E. Smith, Stevenson Buchan and Arthur G. Hutchison ; report and map prepared for the proprietor by Arthur G. Hutchison ; with an introduction by W. Douglas SimpsonMilne & Hutchison1930