000 00298nam a2200121Ia 4500
008 211209s1971 xx 000 0 und d
041 _aeng
082 _a658.542 N71 DAL
100 _aDALELA S
245 _aELEMENTS OF WORKS THEORY
260 _aNEW DELHI
_bSTANDARD PUBLISHERS
_c1971
300 _a306
999 _c5729
_d5729