TY  - BOOK
AU  - Winchell, Constance Mabel,
AU  - Mudge, Isadore Gilbert,
TI  - Guide to reference book
U1  - 016 WIN 
PY  - 1951///
CY  - Chicago
PB  - American Library Association
KW  - Reference books
KW  - Bibliography
N1  - "Based on the Guide to reference books, sixth edition, by Isadore Gi lbert Mudge."; -----Supplement, 1950-1952, by Constance M. Winchell and Olive A. Jo hnson. Chicago, American Library Association, 1954. 117 p. 28 cm; ------Third supplement, 1956-1958. Chicago, American Library Associa tion, 1960. 4 p.l., 145 p. 28cm
ER  -