- 1779 downloads at 29 mb/s
MP3 version
- 1650 downloads at 15 mb/s
FLAC version
Tracklist
| A | I Didn't Know | 4:05 |
| B | Theme For Jenny (Instrumental Version Of "I Didn't Know") | 3:25 |
Companies, etc.
- Phonographic Copyright (p) – WEA International Inc.
- Copyright (c) – WEA International Inc.
- Made By – WEA Musik GmbH
- Distributed By – WEA Filipacchi Music
Credits
- Executive-Producer – Jeffrey Levinson, John Wolff
- Producer – Ph.D.
- Written-By – Diamond*, Hymas*
Barcode and Other Identifiers
- Rights Society: SACEM SACD SDRM SGDL
- Other (Distribution Code): WE 171
Other versions
| Category | Artist | Title (Format) | Label | Category | Country | Year |
|---|---|---|---|---|---|---|
| 25 9996-7 | Ph.D. | I Didn't Know (7", Single) | WEA | 25 9996-7 | Italy | 1983 |
| 25. 9996-7 | Ph.D. | I Didn't Know (7", Single) | WEA | 25. 9996-7 | Netherlands | 1983 |
| 25. 9996-7 | Ph.D. | I Didn't Know (7", Single) | WEA | 25. 9996-7 | Scandinavia | 1983 |
| U 9996 | Ph.D. | I Didn't Know (7", Single) | WEA | U 9996 | UK | 1983 |
| U 9996T | Ph.D. | I Didn't Know (12", Single) | WEA | U 9996T | UK | 1983 |
