7Murphy J, Long D, MacDonald J B. Students' Understanding of the Library of Congress call number system [ J ]. Reference Librarian, 2013,54(2) :103 - 117.
8Choi J W, Oh D I. Tag-only aging-counter localization for the R- LIM2 system[ J ]. Information Systems Frontiers, 2011,13 ( 1 ) : 127 - 137.
9Li Hongfei, Deng Sai. Location and sheff mapping from OPAC search results: With reference to Wichita State University[ J ]. New Library World,2008,109(3 -4) :107 - 116.