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Dänemark| Label: | Columbia 45-DB 4319 |
| Genre: | Rock |
| Style: | Rock & Roll |
| Format: | Vinyl (7") |
| A | Forty Days | |
| B | One Of These Days |
| Label: | Roulette Records R-4154 |
| Genre: | Funk / Soul, Pop, Rock |
| Style: | Rock & Roll, Soul, Ballad |
| Format: | Vinyl (7" , Single , Promo) |
| A | Forty Days | |
| B | One Of These Days |
| Label: | Roulette Records R-4154 |
| Genre: | Rock, Funk / Soul, Pop |
| Style: | Rock & Roll, Soul, Ballad |
| Format: | Vinyl (7" , 45 RPM) |
| A | Forty Days » Written-By: Chuck Berry | 2:14 |
| B | One Of These Days » Written-By: Jacqueline Magill, Ron Hawkins | 2:32 |
| Label: | Apex (3) 76499 |
| Genre: | Funk / Soul, Pop, Rock |
| Style: | Rock & Roll, Soul, Ballad |
| Format: | Vinyl (7" , 45 RPM) |
| A | Forty Days | 2:14 |
| B | One Of These Days | 2:32 |
| Label: | Roulette Records R-4154 |
| Genre: | Funk / Soul, Pop, Rock |
| Style: | Rock & Roll, Soul, Ballad |
| Format: | Vinyl (7" , 45 RPM) |
| A | Forty Days | 2:14 |
| B | One Of These Days | 2:32 |
