The paper explains in detail the quality and cost of the Packet Switched Public Data Network (PSPDN) by on line searching of the databases in the network of three information units in Beijing and a conclusion is thus drawn by the authors that PSPDN is superior to the telephone network in both communication quality and communication cost. The paper also give some comments on the databases in the networking of the above three units from the view of the user.
金丽华,刘洪,董剑安. 三家数据库与CNPAC网的使用和分析[J]. 现代图书情报技术, 1992, 8(3): 2-6.
Jin Lihua,Liu Hong,Dong Jianan. APPLICATION AND ANALYSIS OF DATABASES IN THREE UNITS WITH CNPAC NETWORK. New Technology of Library and Information Service, DOI：10.11925/infotech.1003-3513.1992.03.01.