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003 OSt
005 20220928143812.0
006 a|||||r|||| 00| 0
007 ta
008 220927b |||||||| |||| 00| 0 eng d
024 _a23162
037 _cTextual
040 _aSDCL
_cSDCL
_beng
041 _2eng
_aeng
082 _aC6:(B), M0
100 _aErisman A M Ed.
_9506093
245 0 _aElectric power problems
_b The mathematical challenge.
260 _c1980
942 _hC6:(B), M0
_cTEXL
_2CC
999 _c825108
_d825108