Publishers
- 1st The Queen's Dragoon Guards 2
- 6000 Locomotive Association 1
- A & C Black Publishers 1
- A Paris 1
- A Publishing 1
- A. & C. Black 23
- A. & C. Black Ltd. 36
- 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. Walker & Son 1
- A. Wheaton & Co. Ltd. 9
- A. Wilkinson 1
- A. Ziemsen 3
- A.A. Balkema 5
- A.B. Campbell & Co. 1
- A.C. Fifield 1
- A.C. Mcclurg 1
- A.D. Innes & Co. 3
- A.G. Murdoch 1
- A.H. & A.W. Reed 2
- A.H. Packer 1
- A.K. Newman and Co. 3
- A.L. Burt Company 2
- A.N. White 1
- A.R. Mowbray & Co. Limited 3
- A.R.G. Gantner 1
- A.R.Mowbray & Co. Ltd 3
- A.S. Barnes and Company 1
- A.T. Bannister 1
- A.W. Sijthoff 1
- AA 1
- Aappl Artists' and Photographers' press Ltd. 1
- Aardvark Publishing 1
- Ab Id Kort 1
- Abacus 1
- Abacus Press 2
- Abbeville Press 5
- Abbey Library 1
- Abbeydale Press 1
- ABC 4
- Abel Heywood & Son 1
- Abel Heywood & Son Ltd. 1
- Abelard 4
- Abelard-Schuman 8
- Abelard-Schuman Limited 2
- Abhinav Publications 1
- Abingdon Press 1
- Able Publishing 1
- Abracadazzle 1
- Abraham Wolfgang 1
- Abrams 2
- Abrams Books For Young Readers 2
- Abson Books 1
- Academic Press 37
- Academy Books 1
- Academy Editions 3
- Academy For Rural Devlopment Peshawar 1
- Ad Hoc Publications 7
- Adam & Charles Black 49
- Adam & Charles Black Ltd 1
- Adam Hilger Ltd. 2
- Addey & Co. 1
- Addison-Wesley 7
- Addison-Wesley Longman 1
- Addison-Wesley Publishing Company 2
- Addison-Wesley Publishing Company Inc. 3
- Adelphi Company 1
- Adlard Coles 2
- Adprint 1
- Adprint Limited 4
- Adprint Ltd. 1
- Adrian M. Feather 2
- Advanced Mile-Posts Publications Ltd 1
- Advanced Visions Inc. 2
- Adventure Publications, Inc 1
- Aeberhard & Partners 1
- Aero Publishers 1
- Aero Publishers Inc 2
- Aerofax 1
- Aerospace 10
- Afon Taf History Research Group 1
- Ahmadu Bello University Press 2
- Aidan Ellis Publishing Limited 1
- Aip Press 1
- Air Britain 2
- Air Force Association 1
- Air Force History & Museums Program 1
- Air Museum Publications (york) Ltd 1
- Air Review Ltd. 2
- Air University Press 1
- Air-Britain 4