000 00270nam a2200121Ia 4500
008 220201s1972 xx 000 0 eng d
082 _bDRE
100 _aDreyfuss, Henry
245 0 _aSymbol source book
260 _bMc graw Hill
_c1972
300 _a292
942 _2ddc
999 _c19743
_d19743