00613cam a2200193 4500 91730500 TxAuBib 20061207120000.0 110601s2011||||||||||||||||||||||||eng|u 36297 Project Gutenberg PGUSA eng TxAuBib Luckiesh, Matthew. Visual Illusions Their Causes, Characteristics and Applications [Gutenberg] / by Matthew, 1883-1967 Luckiesh. Project Gutenberg, 2011. Project Gutenberg. Freely available. Electronic text. http://www.gutenberg.org/license Rights TXTLL