- Adams, A[r]thur1
- Adams, Archibald57
- Adams, Charles, 1795-18211
- Adams, James1
- Adams, John Quincy2
- Adams, John, 1735-18261
- Adams, LĂ©onie, 1899-19881
- Addison, Joseph1
- Adelsverein1
- Adolfsson, Mattias1
- Advent Christian Church. Woman's Home and Foreign Mission Society235
- Africa Inland Mission15
- Afro-Am Alliance (Philadelphia, Pennsylvania)1
- Agate, Alfred Thomas1
- Agate, C.C.1
- Agenda (London, England)1
- Agresti, Olivia Rossetti, 1875-19601
- Agricultural Workers Organizing Committee. Northern California Area Council1
- Aigner, Lucien2
- Alaska Communication System1