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Quarrying and crushing methods and costs at the Plainville, (Conn.,) trap-rock quarry of the New Haven Trap Rock Co., New Britain, Conn. / by A.L. Worthen.

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Online Access:	Search for the full-text version of this title in HathiTrust
Main Author:	Worthen, A. L.
Corporate Author:	United States. Bureau of Mines
Other title:	Quarrying and crushing methods and costs at the Plainville, Conn., trap-rock quarry of the New Haven Trap Rock Co., New Britain, Conn.
Format:	Government Document Book
Language:	English
Published:	[Washington, D.C.] : U.S. Dept. of the Interior, Bureau of Mines, 1936.
Series:	Information circular (United States. Bureau of Mines) ; 6920.
Subjects:	Quarries and quarrying > Connecticut. Quarries and quarrying > Connecticut > Cost of operation.

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Call Number:	I 28.27:6901-6925
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