2Riley R A,Shipman B L. Building and maintaining a library Gopher:traditional skills applied to emerging resources[J].{H}Bulletin of the Medical Library Association,1995.221-227.
3Marstall J G,Fitzgerald D,Busby L. A study of library use in problem-based and traditional medical curricula[J].{H}Bulletin of the Medical Library Association,1993.299-305.