Exploring Double Notes For Organs, Pianos and Electronic Keyboards - A special supplementary edition teaching how to create two-part harmony by playing "double notes" in the melody
| Country | USA |
| Manufacturer | Hal Leonard |
| Binding | Paperback |
| UnitCount | 1 |
| UPCs | 073999021035 |
| EANs | 9781423444039 |
| ReleaseDate | 0000-00-00 |