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Canada | |
| Grice, Joel D. (1989) Cobalt: the Silver City. In: Famous mineral localities of Canada. Published by Fitzhenry & Whiteside Limited & the National Museum of Natural Sciences, 190 pages: 85-91 [www.ontariominerals.com] 159-161. |
| Petruk, W., Harris, D. C., Stewart, J. M. (1969) Langisite, a new mineral, and the rare minerals cobalt pentlandite, siegenite, parkerite, and bravoite from the Langis mine, Cobalt-Gowganda area, Ontario, Canada. The Canadian Mineralogist, 9 (5) 597-616 |
| Reiner Mielke 2014 |
| Petruk (1971): The Silver-Arsenide Deposits of the Cobalt-Gowganda Region, Ontario. Can. Mineral. 11, 150-186 |
Lawson Mine, Coleman Township, Cobalt area, Cobalt-Gowganda region, Timiskaming District, Ontario, Canada