000 00274nam a2200121Ia 4500
008 211209s1980 xx 000 0 und d
041 _aeng
082 _a515.24 N80 FER
100 _aFERRAR W L
245 _aTEXT BOOK OF CONVERGENCE
260 _bO U P
_c1980
300 _a192
999 _c2334
_d2334