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 |
| Brand | Hal Leonard |
| Manufacturer | HAL LEONARD CORPORATION |
| Binding | Paperback |
| ItemPartNumber | 102102 |
| ReleaseDate | 1990-06-01 |
| UnitCount | 1 |
| UPCs | 073999264029 |
| EANs | 9780793524129 |