Centrifugal Ventilators, Reprinted from Mines and Minerals for September, October, and November 1899
Scranton, Pennsylvania: The Colliery Engineer Co., 1900. Softcover. Very Good. Item #9434
Offprint. 6 3/4" tall. 30 pp. Stapled wraps. From private collection. Wraps show a little foxing.
Price: $20.00
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