00540nam a2200169Ia 4500 CTU_52743 210402s9999 xx 000 0 und d 025.52 R333 Reference and information services : An introduction Edited by Richard E. Bopp and Linda C. Smith Englewood, Colorado Libraries Unlimited, Inc 1991 Reference services (libraries),Information services Trung tâm Học liệu Trường Đại học Cần Thơ