- Arnold, C. E. (Charles Edward), 1866-19021
- Artillery School (Fort Monroe, Va.)1
- Asia--Amu Darya1
- Aspin, J1
- Aspioti-ELKA (Firm)1
- Assheton, J. T1
- Association des intérêts de Genève1
- Atwood, J. M., fl. 1840-18651
- Australia. Department of Defence1
- Australia. Department of Home and Territories1
- Australia. Department of Works. Lands and Survey Branch1
- Austria. Handels-Ministerium1
- Automobile Club of Minneapolis1
- Automobile Club of Saint Paul1
- Automobile Club of Southern California1
- Automobile Club of Western Washington1
- Avery, Carlos, 1868-19311
- Ayres, H. B. (Horace Beemer), 1856-1
- B.A.M. Froiseth (Firm)1
- B.F. Goodrich Company. National Touring Bureau1