Publishers
- Brown, Son & Ferguson Ltd. 4
- Brown, Taggard & Chase 1
- Browne and Nolan Ltd. 1
- Brownsword Books 1
- Bruce & Gawthorn Limited 1
- Bruce Main-Smith & Co. Ltd. 4
- Brumby & Clarke, Limited 1
- Bruno Cassirer 1
- Brunot-Labbe 1
- Bryngold Books 1
- Buchan & Enright 1
- Buchebroc Press 1
- Buckingham Press 1
- Budding Books 2
- Budget Books 1
- Budget Print & Design 1
- Bufe-Fachbuch 1
- Bullfinch Publications 2
- Bundesamt Fur Naturschutz 1
- Bunny And Gold 1
- Burke 7
- Burke & Co Ltd. 1
- Burke Books 1
- Burke Publishing 1
- Burke Publishing Company Ltd. 6
- Burlington Publishing Company Limited 1
- Burnett Books 1
- Burns & Oates 5
- Burns Oates And Washbourne Ltd. 2
- Bus Enthusiast Publishing Company 2
- Buschlen Mowatt 1
- Butterworth & Co. (publishers) Ltd 1
- Butterworth-Heinemann Ltd. 1
- Butterworths 6
- Butterworths Scientific Publications 1
- Button Books 1
- C. & J. Temple Ltd. 1
- C. Arthur Pearson Ltd. 10
- C. Combridge 1
- C. Cooke 3
- C. Davis 1
- C. Dilly 1
- C. Dilly, In The Poultry 1
- C. Hurst & Company 1
- C. Jaques 1
- C. Stalker 2
- C. Struik 2
- C. Tilt and Simpkin and Co. 2
- C. Titcombe 1
- C.A. Kaemmerer 1
- C.A. Kochs 1
- C.A. Publications Ltd. 10
- C.A. Publications, Ltd. 3
- C.A. Reitzels 1
- C.F. Braun & Co. 1
- C.H. Daniels 1
- C.I. Thomas 1
- C.J. Clay & Son 1
- C.J. Perkins 1
- C.S.S.M. 1
- C.W. Faulkner & Co. Ltd. 1
- C&o Historical Society 1
- Cabi 1
- Cabi International 1
- Cadell & Davies 3
- Cadogan Books 1
- Cadogan Publications 1
- CADW 2
- Caerwent Historic Trust 1
- Calder Walker Associates 1
- Cambrian Archaeological Association 15
- Cambrian Ornithological Society 1
- Cambridge House Books 1
- Cambridge Scholars Press Ltd. 1
- Cambridge University Press 119
- Camden Miniature Steam Services 2
- Cameron May 1
- Campbell Books 1
- Camps & Tours Union 1
- Canada Department Of Mines 1
- Canada's Wings 1
- Canadian National Railways 1
- Candlewick Press 2
- Canongate 3
- Canongate Books Ltd 1
- Canongate Publishing Limited 2
- Cape Times 1
- Capital Transport 8
- Capitol Publishing Co. 1
- Caradon District Council 1
- Cardiff Council 1
- Cardiff Free Libraries 1
- Cardiff University 1
- Cardiff University Of Wales Press 2
- Carey Press 1
- Carington Bowles 2
- Carl Fromme 1
- Carl Hanser 1
- Carl Winter 1
- Carlton Books Limited 8