Title
- The Billboard 1925-02-28: Vol 37 Iss 944
- The Billboard 1925-03-07: Vol 37 Iss 1044
- The Billboard 1925-05-09: Vol 37 Iss 1944
- The Billboard 1925-05-16: Vol 37 Iss 2044
- The educational talking picture44
- What's New?44
- FM Transmitters, 1948-195843
- National Film Archive catalogue, part II : silent non-fiction films 1895-193443
- The Billboard 1913-08-23: Vol 25 Iss 3443
- The Billboard 1917-05-12: Vol 29 Iss 1943
- The Billboard 1918-01-26: Vol 30 Iss 443
- The Billboard 1919-07-26: Vol 31 Iss 3043
- The Billboard 1919-08-02: Vol 31 Iss 3143
- The Billboard 1919-09-13: Vol 31 Iss 3743
- The Billboard 1919-10-11: Vol 31 Iss 4143
- The Billboard 1919-11-01: Vol 31 Iss 4443
- The Billboard 1920-04-03: Vol 32 Iss 1443
- The Billboard 1920-10-09: Vol 32 Iss 4143
- The Billboard 1920-11-27: Vol 32 Iss 4843
- The Billboard 1921-07-16: Vol 33 Iss 2943