000 00259nam a2200109Ia 4500
008 231212s1980 xx 000 0 und d
041 _aeng
082 _a621.381
100 _aMaron I.A.
245 _aProblems in Calculas of
260 _aMascow
_bMir Pub
_c1980
999 _c958426
_d958426