TY  - BOOK
AU  - Butler,Pierce
AU  - Wilson,Louis R.
TI  - The reference function of the library
U1  - 020 BUT 
PY  - 1943///.
CY  - Chicago : 
PB  - The University of Chicago Press, 
KW  - Librarianship and library resources
KW  - Reference services (Libraries) -- Congresses
ER  -