1. Geological map of the vicinity of Copper Cliff, Sudbury mining district, Ontario Yale Public content 1903. 2018-06-26T18:13:43Z. 2020-08-14T18:08:36Z. Barlow, Alfred E. (Alfred Ernest), 1861-1914, cartographer. Geological Survey of Canada. English. cartographic image. Public. Ontario and Sudbury (District).