Publishers
- 1st The Queen's Dragoon Guards 3
- 6000 Locomotive Association 1
- A & C Black Publishers 1
- A Paris 1
- A Publishing 1
- A. & C. Black 43
- A. & C. Black Ltd. 47
- A. & E. Publishers Ltd. 1
- A. Anton & Co 1
- A. Brown & Sons Ltd. 1
- A. Capendu 1
- A. Deichert'Sche 1
- A. Desesserts 1
- A. Dodd 1
- A. Druce 1
- A. Huschke 1
- A. John Ward 1
- A. Neumann 1
- A. Stark 1
- A. Walker & Son 1
- A. Wheaton & Co. Ltd. 11
- A. Ziemsen 3
- A. Zwemmer 1
- A.A. Balkema 6
- A.B. Campbell & Co. 1
- A.C. Fifield 1
- A.C. Mcclurg 1
- A.C. Promotion 1
- A.D. Innes & Co. 3
- A.H. & A.W. Reed 2
- A.H. Packer 1
- A.H. Tucker 1
- A.K. Newman and Co. 3
- A.L. Burt Company 3
- A.R. Harding 1
- A.R. Mowbray & Co. Limited 3
- A.R.Mowbray & Co. Ltd 2
- A.S. Barnes and Company 3
- A.T. Bannister 1
- A.W. Sijthoff 1
- AA 1
- Aappl Artists' and Photographers' press Ltd. 2
- Aardvark Publishing 1
- Ab Id Kort 1
- Abacus Press 2
- Abbeville Press 8
- Abbey Library 1
- Abbeydale Press 1
- ABC 5
- Abel Heywood & Son 1
- Abel Heywood & Son Ltd. 1
- Abelard 5
- Abelard-Schuman 12
- Abergavenny Local History Society 1
- Abhinav Publications 1
- Abingdon Press 1
- Able Publishing 1
- Abracadazzle 2
- Abraham Wolfgang 1
- Abrams 2
- Abrams Books For Young Readers 3
- Abson Books 2
- Abstract Sounds Books Ltd 1
- Academic Press 44
- Academy Books 1
- Academy Editions 3
- Academy For Rural Devlopment Peshawar 1
- Accademia Nazionale Dei Lincei 1
- Ackermann & Co. 1
- Ad Hoc Publications 2
- Adam & Charles Black 89
- Adam Gallery 1
- Adam Hilger Ltd. 4
- Adams & Dart 3
- Addey & Co. 1
- Addison-Wesley 9
- Addison-Wesley Longman 1
- Addison-Wesley Publishing Company 1
- Addison-Wesley Publishing Company Inc. 5
- Adelphi Company 1
- Adlard Coles 2
- Adprint 2
- Adprint Limited 4
- Adprint Ltd. 2
- Adrian M. Feather 3
- Advanced Mile-Posts Publications Ltd 1
- Advanced Visions Inc. 2
- Adventure Publications, Inc 1
- Aeberhard & Partners 1
- Aero Publishers 4
- Aerodata International 2
- Aerofax 4
- Aerospace 13
- Aerospace Publications Pty Limited 1
- Ahmadu Bello University Press 2
- Aidan Ellis Publishing Limited 1
- Aidu(raf) 1
- Aip Press 1
- Air Britain 1
- Air Force History & Museums Program 1