000 00293nam a2200121Ia 4500
008 250224s9999 xx 000 0 und d
020 _a85274482
082 _a621.381HOR
100 _aHorne Douglas
245 0 _aPhotomasks, Scales and Gratings
260 _bAdam Hilger
_c1983
942 _cBK
999 _c431477
_d431477