Harrold, Ann
Libraries in the United Kingdom and the Republic of Ireland 1987
Library Association, 1986
 Buku Referensi
Whitaker : publishers in the United Kingdom and their addresses, 1989
J. Whitaker & Sons, 1989
 Buku Referensi
Whitaker : publishers in the United Kingdom and their addresses, 1995
J. Whitaker & Sons, 1995
 Buku Referensi
Shorter Aslib directory of information sources in the United Kingdom
edited by Ellen M. Codlin
Aslib, 1986
 Buku Referensi
Davenport, Neil, author
The United kingdom patent system : a brief history with bibliography
Kenneth Mason, 1979
 Buku Teks
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