TY  - BOOK
AU  - Rothstein, Samuel.
TI  - The development of reference services ; throug academic traditions, public library practice and special librarianship
T2  - ACRL Monographs
U1  - 025.52 
PY  - 1972///
CY  - Boston
PB  - Gregg Press
KW  - Servicios de consulta (bibliotecas)
ER  -