TY - BOOK AU - Thorpe,John A. TI - Elementary topic in differential geometry SN - 0-387-90357-7 U1 - 516.36 PY - 1979/// CY - New York PB - Springer-Verlag KW - Differential Geometry KW - Integral geometry KW - Mathematics N1 - Includes bibliograp,hical references and index ER -