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＜図書＞
Tape and disk files. : Cobol book 3 / Ruth Ashley, Judi Fernandez.
(Data proceesing training series)

出版者	New York : Wiley
出版年	c1984
大きさ	x, 267 p : ill ; 29 cm.
著者標目	Ashley, Ruth Fernandez, Judi N., 1941-
件　名	File organization. (computer science) COBOL (Computer program language) Data tapes Data disk drives

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