000			00322 a2200133 4500
020			_a81-7029-327-8
090			_c2646 _d2646
100			_aStevens, Al
245			_aTeach yourself Dos
260			_aNew Delhi _bBPB _c1990
300			_axii, 267p.
650			_a681.3.066 _xDOS - computer software
942			_cBK _k681.3.066 STE
999			_c332828 _d332828