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Drafting room methods (1918)

Collins, Charles Dickey, 1872- [from old catalog] · New York, D. Van Nostrand company · leaf 66

An illustration from Drafting room methods, 1918, leaf 66
^^_^ LIMESTONE ORANITE CONGLOMERATE Symbols for Geologic Formations … SHALE

Drawing-room practice · Mechanical drawing

Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.

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