000 00286nam a2200109Ia 4500
008 240531s9999 xx 000 0 und d
082 _a511 5077HAR
100 _aHarris, Roy
245 0 _aGraphs: A clear way programmed book.
260 _aLondon
_b Methuen
_Co Ltd
_c1967
942 _cANF
999 _c315136
_d315136