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IBM Technical Disclosure Bulletin,. vol. 34, No. 7A, Dec. 1991, New York, US; p. 260, XP255521; "LAN Disk Space Monitor", entire document. |
Ch. Devoney "Using PC DOS, 2nd Edition" 1987, Que Corp, Carmel, Indiana, US; Chapter 14: Customizing DOS * p. 301, line 1-p. 317, line 23. |