https://geoscan.nrcan.gc.ca/starweb/geoscan/servlet.starweb?path=geoscan/fullf.web&search1=R=323682
Canada Department of Energy, Mines and Resources, 1966
Four distinct zones (A, B, C and D) of the Trois-Pistoles sandstone were tested for their suitability for use as building-stone material. The zones proved to...
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