Archived Content Notice: This publication is provided for reference, research or recordkeeping purposes. It is not
subject to the Government of Canada Web Standards and has not been altered or updated since it was archived. Please contact us to
request a format other than those available.
Investigation of a british market for canadian non-metallic minerals; Spence, H S. Canada Department of Mines, Mines Branch,
Memorandum Series no. 6, 1922, 8 pages,
https://doi.org/10.4095/331571 
Open Access