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Mechanical drawing problems for high schools, normal schools and vocational schools (1918)
Berg, Edward. [from old catalog], Kronquist, Emil F. (Emil Fritjoff), b. 1882 · Peoria, Ill. : The Manual arts press · leaf 75
^rcf. ANGLE OP FROJBC.TIO^. 5HO^A/INC> THJVEfiT/CAl. , HORIZONTAL- AND P/=iOf=/UE. … PLANES UNPOL-OEO PLANES OF PROJECTION (Continued)Mechanical drawing
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
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