Guide to reference material Vol. 1. Science & technology Walford, A. J. (Albert John) Library Association text bibliography enk London New York, N.Y Library Association Distributed in the U.S.A. by R.R. Bowker 1973 1973 3rd ed. continuing eng
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3 v. ; 26 cm. Editor: 1959-1977 A.J. Walford. Issued in 3 v., 2nd ed.-3rd ed. Vol. issued in 1959 has supplement. Reference books Bibliography Z1035.1 .W33 011 WAG Walford's guide to reference material (DLC) 2002201820 (OCoLC)20336077 0853653267 2002201819 MnMULS 760620 20170608081723.0 12728296 eng