TY  - BOOK
AU  - Katz, William A
AU  - Katz,William A
TI  - Introduction to Referecnce Worl:  Vol.I: Reference Services
U1  - M21 
PY  - 1969///
CY  - New York
PB  - Mcgraw-Hill Book Company
N1  - includes index and biblioraphy
ER  -