VARIATIONS OF INFORMATION REQUIREMENT AND ITS COUNTERMEASURES
Wang Nengqin,Zhu Shuhan
New Technology of Library and Information Service . 1993, (4): 40 -43 .  DOI: 10.11925/infotech.1003-3513.1993.04.09

Copyright © Data Analysis and Knowledge Discovery, All Rights Reserved.
Tel: (010)82626611-6626，82624938　
E-mail：jishu@mail.las.ac.cn
Total visitors:   Visitors of today:   Now online:
Powered by Beijing Magtech Co. Ltd.