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The structural and industrial materials of California (1906)
Aubury, Lewis E., b. 1862 · Sacramento, W.W. Shannon, Superintendent State printing · leaf 196
ILL. No. 84. STEAM SHOVEL AT WORK IN CLAY PIT. PACIFIC PORTLAND CEMENT COMPANY, CONS., SOLANO COUNTY.Building stones · Portland cement · Clay · Mines and mineral resources
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