TY  - BOOK
AU  - Walford, A.J.
TI  - Guide to reference material
U1  - R 028.7 21st ed.
PY  - 1959///
CY  - London
PB  - The Library Association
KW  - Reference book
KW  - Applied science
KW  - Reference server (Libraries)-guide
KW  - Science & technology
N1  - Content.V.1: Science & Technology
ER  -