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Senior course in mechanical drawing (1897)
Thorne, William H[enry], 1847- [from old catalog] · Philadelphia, Williams, Brown & Earle · leaf 160
Stale - 2>*>v» = ^t vrm.H.Thoiwt.UieTllst.iftft^. Plate 31 Tlate 31 i Iltc/h ~ Steap CVvec,l- Covev. (fc$xie) toMechanical drawing
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
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