00279nam a2200121Ia 4500082001700000100002200017245003900039260002800078300000900106490003200115500000500147700000500152  a512bN147.OA  aNagata, Masayoshi  aOn automorphism group of K (x,y)b  aTokyobKinokuniyac1972  a53p.  aLectures in Mathematicsv 5  a  a