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A treatise on levelling, topography, and higher surveying (1876)
Gillespie, W. M. (William Mitchell), 1816-1868, Staley, Cady, b. 1840, ed · New York, D. Appleton and company · leaf 81
62 LEVELLING, TOPOGRAPHY, AND HIGHER SURVEYING. Fig. 77. … Fig. 78.Surveying
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
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