Vodden, Christy (1992). No Stone Unturned; the First 150 Years of the Geological Survey of Canada.
Vodden, Christy (1992). No Stone Unturned; the First 150 Years of the Geological Survey of Canada. [Ottawa: Ministry of] Energy, Mines and Resources. 52pp. 1st edition. Paperback, negligible wear. Text clean, unmarked. In fine condition.