TY - BOOK ID - 132278520 TI - Non-euclidean geometry: a critical and historical study of its developments AU - Bonola, Roberto AU - Bolyai, John PY - 1955 PB - New York Dover DB - UniCat KW - Geometry KW - History UR - https://www.unicat.be/uniCat?func=search&query=sysid:132278520 AB - ER -