- Atchison, Topeka, and Santa Fe Railway Company.2
- Atherton, Gertrude Franklin Horn, 1857-19481
- Baader Holst, Matthias, 1962-1
- Babbitt Brothers Trading Co1
- Bachrach1
- Badlam, Maude1
- Baker8
- Baker, Oliver2
- Baker, Richard Brown1
- Balanchine, George, choreographer1
- Baldwin, Schuyler C1
- Ball & Thomas2
- Banks, Richard, 1929-1
- Banyan Press1
- Bara, Theda, 1890-19551
- Barboza, Anthony, 1944- photographer1
- Bardell, J. C17
- Barnes Foundation1
- Barnes, Will C. (Will Croft), 1858-19363
- Barratt, J1