Publishers
- Bonfini Press 4
- Bonhams 1
- Book Club 1
- Book Club Associates 32
- Book Guild Publishing 2
- Book Law Publications 12
- Bookano Strand Publications Ltd. 1
- Bookland Private Limited 3
- Booklaw Publications 3
- Booklaw Railbus 5
- Bookmarque Publishing 1
- Books For Children 1
- Books International 1
- Boosey & Co. Ltd. 1
- Booth Museum Of Natural History 1
- Booth-Clibborn 2
- Boots 1
- Boots the Chemists 8
- Bosch 1
- Bossiney Books 3
- Botanical Society Of The British Isles 2
- Botanischer Garten Und Botanisches Museum Berlin-Dahlem 1
- Bounty Books 4
- Bountyhunter Publications 1
- Boxtree 3
- Boxtree Limited 2
- BPC Publishers Ltd. 1
- Bracken Books 10
- Bradbury & Evans 2
- Bradbury Press 3
- Bradbury, Agnew & Co. 1
- Bradbury, Agnew & Co. Ltd. 4
- Bradford Barton 2
- Bradley Publications Of Hull 1
- Brambleby Books 1
- Bramley Books 6
- Branden Books 1
- Brassey's 16
- Brecknock Museum 1
- Breedon Books Publishing Co. 10
- Brehmer & Minuth 1
- Brentano's 2
- Brentano's Ltd 1
- Brevet Press 1
- Brewin Books 4
- Brian Bridgeman 1
- Brian Trodd 2
- Bridge Books 5
- Bridgeway Press 1
- Brimax Books 6
- Bristol Aero Collection 1
- Bristol Aircraft Limited 1
- Bristol and Gloucestershire Archaeological Society 2
- Bristol Branch Of The Historical Association 1
- Bristol City Council 1
- Bristol Docks Office 1
- Bristol Industrial Archaeological Society 1
- Britbooks 1
- British & Foreign Bible Society, The 1
- British Academy 1
- British Association for the Advancement of Science 1
- British Aviation Publications Ltd 1
- British Aviation Research Group 1
- British Birds Ltd. 1
- British Books Ltd. 1
- British Broadcasting Corporation 9
- British Bryological Society 1
- British Bus Publishing 1
- British Gas Council 1
- British Geological Survey 1
- British Insulated Callender's Cables 1
- British Leyland 2
- British Museum 6
- British Museum Press 1
- British Ornithologists' union 26
- British Rail (Western) 2
- British Railways 2
- British Standards Institution 1
- British Trust for Ornithology 24
- British Waterways Board 1
- Broads 1
- Brockhampton Press 115
- Brockhampton Press Ltd. 30
- Brooklands Books 14
- Brooks Cole 2
- Brookside Publishing 1
- Brown & Bibby 1
- Brown & Co. 1
- Brown and Brown 1
- Brown Watson 4
- Brown Watson Ltd 1
- Brown Wells & Jacobs Ltd. 3
- Brown, Prior, Anderson 1
- Brown, Son & Ferguson Ltd. 7
- Brownsword Books 1
- Broxbourne Press (printers) Limited 1
- Bruce & Gawthorn Limited 3
- Bruce Coleman 1
- Bruce Main-Smith & Co. Ltd. 5
- Bruno Cassirer 2