TY - BOOK AU - Krauss,Rosalind E. TI - The optical unconscious SN - 026211173X AV - N7430.5 .K73 1993 U1 - 701 20 PY - 1993///] CY - Cambridge, Mass. PB - MIT Press KW - Visual perception KW - Optical illusions N1 - "October books."; Includes bibliographical references (pages 331-337) and index ER -