erovnuli-samecniero-biblioteka Search for 'au:"Spence, Hugh S."'

Mica, its occurrence, exploitation, and uses;

By Spence, Hugh S..
Ottawa, Government Printing Bureau, 1912 .
xiv, 411 p. , At head of title: Canada. Dept. of Mines. Mines Branch. | First edition, published 1905, was by Fritz Cirkel. 25 cm..

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Feldspar in Canada,

By Canada..
Ottawa, Government Printing Bureau, 1916 .
viii, 126 p. , "No. 401." 25 cm..

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Talc and soapstone in Canada,

By Canada..
Ottawa, F. A. Acland, printer, 1922 .
85 p. , "No. 583." 25 cm..

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