TY - BOOK TI - Peter Norton's DOS guide SN - 8769259310 | 0136620736 (pbk.) : PY - 1987/// CY - New York, N.Y. PB - Brady : | Distributed by Prentice Hall Trade N1 - Rev. ed. of: MS-DOS and PC-DOS. 1st ed. c1984. | Includes index ER -