TY  - BOOK
AU  - Liu Jia
TI  - Evaluation of worldwide digital reference services in libraries
T2  - Chandos : information professional series
SN  - 1843343096 (pbk)
U1  - 2:7(D65,8(B)):b4, P7 (2D) 
PY  - 2007///
CY  - Oxford
PB  - Chandos Publishing UK     
KW  - LIBRARY SCIENCE
ER  -