6[1]Z39.50— 1995 : Information retrieval protocol : An introduction to the standard and it's usage / Juha Hakala HYPERLINK http://renki. helsinki. fi/z3950pr, html http://renki. helsinki. fi/z3950pr, html
7[2]Z39.50: An Overview of Development and the Future / Susannah Iltis HYPERLINK http://www. cqs. washington. edu/～ camel/z/z. html http://www. cqs. washington. edu/～ camel/z/z. html
8[3]The CIC Virtual Electronic Library integrates resources and services/Barbara Mcfadden Allen HYPERLINK http://NTX2.cso. uiuc. edu/cic/cli/velarticle. html http://NTX2. cso. uiuc.edu/cic/cli/velarticle.html
9[4]Report to the CIC on the State of Z39.50 Within the Consortium/ Mark Hinnebusch
10[5]State Library of Iowa HYPERLINK http://www.silo.lib.ia.us/ted_htmls/silo_wha.html http://www.silo.lib.ia.us/ted_htmls/silo_wha.html
