TY  - BOOK
AU  - Walford, A. J.
ED  - Library Association.
TI  - Guide to reference material: Vol. 1. Science & technology 
SN  - 0853653267
AV  - Z1035.1 .W33
U1  - 011 WAG 
PY  - 1973///
CY  - London, New York, N.Y.
PB  - Library Association, Distributed in the U.S.A. by R.R. Bowker
KW  - Reference books
KW  - Bibliography
N1  - Editor: 1959-1977 A.J. Walford; Issued in 3 v., 2nd ed.-3rd ed; Vol. issued in 1959 has supplement
ER  -