Title
- The Billboard 1918-08-31: Vol 30 Iss 3534
- The Billboard 1923-09-08: Vol 35 Iss 234
- The Billboard 1924-05-31: Vol 36 Iss 2234
- The Billboard 1924-08-09: Vol 36 Iss 3234
- The Billboard 1925-07-25: Vol 37 Iss 3034
- The Billboard 1925-11-14: Vol 37 Iss 4634
- The first quarter-century of American broadcasting34
- Education by Radio33
- Membership, Directories, 1956-195733
- Motion picture studio directory and trade annual 192133
- NAEB Placement service, 1954-195533
- The Billboard 1908-04-11: Vol 20 Iss 1533
- The Billboard 1911-02-11: Vol 23 Iss 633
- The Billboard 1911-12-16: Vol 23 Iss 5033
- The Billboard 1913-02-08: Vol 25 Iss 633
- The Billboard 1913-03-01: Vol 25 Iss 933
- The Billboard 1914-02-14: Vol 26 Iss 733
- The Billboard 1914-05-09: Vol 26 Iss 1933
- The Billboard 1914-11-07: Vol 26 Iss 4533
- The Billboard 1915-01-16: Vol 27 Iss 333