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The methods used in primary level and triangulation work in unsettled and broken country (1909)
Stewart, John Truesdale · leaf 226
m i if %. 4A 9 >. J 0 0 & -2 6**, in rJ* 6 A -04 1 till 0^ I i?H r -2 a n n a cGeodesy · Surveying · Triangulation · Theses
Internet Archive · University of Illinois Urbana-Champaign · Public Domain Mark 1.0. Free to use for anything.
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