TY - BOOK ID - 126699592 TI - Ptolemy's theory of visual perception: an English translation of the Optics with introduction and commentary AU - Smith, A. Mark AU - Ptolemaeus, Claudius PY - 1996 PB - Philadelphia (Pa.): American philosophical society, DB - UniCat UR - https://www.unicat.be/uniCat?func=search&query=sysid:126699592 AB - ER -