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Bureau of Mines / Minerals yearbook metals and minerals 1985
Year 1985, Volume 1 (1985)
Tepordei, Valentin V.
Crushed stone, pp. 891-912
Page 902
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As a work of the United States government, this material is in the public domain.| For information on re-use see: http://digital.library.wisc.edu/1711.dl/Copyright




