R011.02
 Kat
 I2
        Katz , William Armstrong Introduction to reference work : basic information sources / By William Armstrong Katz . -- 5 . ed . -- New York : McGraw-Hill , 1987 . t . ; 24 cm . -- ( Mc Graw-Mill series in library education ) La biblioteca posee los ts . 1 Contiene : v . 1 Basic information sources . - v . 2 Reference services and reference processes . ISBN 0-07-033537---1)