000 00258nam a2200109Ia 4500
008 170711s9999 xx 000 0 und d
050 _a005.3 Sch33
100 _a"Schildt, Herbert"
245 0 _aTeach yourself DOS
260 _c1990
942 _2lcc
_cBK
_kCirc.
999 _c20553
_d20553