书目信息 机读格式(MARC)
NTIS
| 题名： | NTIS [electronic resource] : National Technical Information Service. |
|---|---|
| 出版发行项： | Boston : SilverPlatter, c1987- |
| 载体形态： | laser optical disks ; 4-3/4 in. + 1 computer disk ; 5-1/4 in. + 1 user's manual. |
| 一般附注： | System requirements: IBM PC or compatible; 640K RAM; DOS 3.1 or higher; 1 disk drive; CD-ROM drive. |