00271nam a2200121Ia 4500082002000000100002100020245003900041250000900080260002800089300002200117500000500139700000500144  a515.9bSp769.IR  aSpringer, George  aIntroduction to Riemann surfacesb  a2nd.  aNew YorkbChelseac1931  aviii, 309p. Index  a  a