Inside Out Library
Shades and shadows (1921)
Lange, David C. (David Christoph) · New York : John Wiley & Sons ; London : Chapman & Hall · leaf 91
Fig. 36 Fig. 35 80 SHADOWS OF PLANES a» 5 c d … ^d o.<^ Fig. 37Shades and shadows · Geometry, Descriptive
Internet Archive · Boston Public Library · Public Domain Mark 1.0. Free to use for anything.
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