493. Voluntas: international journal of voluntary and nonprofit organizations New York : Kluwer Academic/Plenum Publishers SW509
494. The qualitative report: an online journal dedicated to qualitative research since 1990 Fort Lauderdale, Fla. : Nova Southeastern University, School of Social and Systematic Studies, 1990- CP605
495. 二十一世纪 Xianggang : Xianggang Zhong wen da xue, Zhongguo wen hua yan jiu suo, 1990- JOUR250 HIST390
498. Educational technology research and development: ETR & D Washington, D.C. : Association for Educational Communications and Technology, [1989]- GED220
500. International journal of human-computer interaction. Norwood, N.J. : Ablex Pub. Corp., 1989- CP534
