Inside Out Library
Shades and shadows (1921)
Lange, David C. (David Christoph) · New York : John Wiley & Sons ; London : Chapman & Hall · leaf 97
86 SHADES AND SHADOWS OF SOLIDS … Fig. 40® Fig. 40fShades and shadows · Geometry, Descriptive
Internet Archive · Boston Public Library · Public Domain Mark 1.0. Free to use for anything.
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