TY - BOOK AU - Withers,John WIlliam ED - Asutosh Collection (National Library, India) TI - Euclid's Parallel postulates: its nature validity and plane in geometrical systems U1 - 513 PY - 1905/// CY - Chicago PB - Open Court Pub. KW - Geometry N1 - Thesis (Ph. D.) -- Yale University, philosophical faulty; Bibliography : p. 177-192 ER -