Publishers
- Temple Smith 1
- Temple University Press 1
- Tempus 47
- Tempus Publishing Ltd 22
- Tempus Reparatum 1
- Tenby Museum 1
- Tennessee University Press 1
- Tentmaker Publications 1
- Teredo Books 2
- Terence Dalton Limited 5
- Tern Press 1
- Terry Underwood 4
- Teton Newmedia 1
- Th. Shroter 1
- Thames and Hudson 33
- Thames Publishing Co. 2
- The 8th Af News 1
- The 8th Air Force Memorial Museum Foundation 1
- The Ace Publishing Company 9
- The Actinic Press 1
- The Adventurers Club 1
- The Advertiser Press Ltd. 1
- The Aeroplane And General Publishing Co. Limited 1
- The Afan Valley Angling Club 1
- The Agricultural Research Corporation 1
- The Air League Of The British Empire 6
- The Albert F. Simpson Historical Research Centre 1
- The Albion Press 1
- The Alderman Press 1
- The Alexandra Publishing Co. 3
- The Alpine Club 1
- The Alvis Register 1
- The Amaising Publishing House Ltd. 1
- The Amalgamated Press 53
- The Amalgamated Press Limited 9
- The American Federation of Arts 1
- The American Ornithologists Union 2
- The American Philosophical Society 1
- The Ammonite Press 1
- The Architectural Press 5
- The Ariel Press 1
- The Armco International Corporation 1
- The Art & Humour Publishing Co. 1
- The Art Institue Of Chicago 2
- The Art Lithographic Publishing Co. 1
- The Artistic Lithographic Company 1
- The Association Of American Rhodes Scholars 1
- The Association Of Consulting Engineers 1
- The Association Of Mouth & Foot Painting Artists 1
- The Association Of Photographers 1
- The Athlone Press 3
- The Austin Motor Company 1
- The Australian Conservation Foundation 1
- The Aviation Book Club 2
- The Aviation Hobby Shop 1
- The Aviation World Publishing Company 1
- The Bairstow Gallery 1
- The Batchworth Press 1
- The Bath Royal Literary And Scientific Institution 1
- The Bathford Society 1
- The Battery Press 1
- The Bazaar, Exchange & Mart 1
- The Bedford Press 1
- The Bemrose Press Limited 1
- The Bentham-Moxon Trust 1
- The Berkshire Atlas Group 1
- The Bermuda Historical Society 1
- The Bertha And Karl Leubsdorf Art Gallery 1
- The Biological Laboratory 1
- The Birkdale And Ainsdale Historical Research Society 1
- The Blackmore Press 1
- The Blakiston Company 1
- The Bloomsbury Publishing Co. Ltd. 4
- The Board Of Management Of The Australian War Memorial 1
- The Bobbs-Merrill Company Inc. 1
- The Bodley Head 76
- The Bodley Head Children'S Books 5
- The Bodley Head Ltd 1
- The Bolus Herbarium 1
- The Bombay Natural History Society 2
- The Book Castle 1
- The Book Guild Ltd. 3
- The Book People Ltd. 1
- The Book Society 3
- The Book Stack 1
- The Book Studio 1
- The Borough Press 1
- The Boston Mills Press 2
- The Bournemouth Natural Science Society 1
- The Boy Scouts Association 20
- The Boy's Own Paper 19
- The Boydell Press 12
- The Bristol Ornithological Club 1
- The British and Foreign Bible Society 2
- The British Archaeological Association 1
- The British Iron & Steel Research Association 1
- The British Library 7
- The British Publishing Company 3
- The British Record Society 2
- The British Records Association 1