| Author's List |
| title | creator | language | description | tableOfContents | contributor | subject | created |
| Essentials in Conducting | Gehrkens, Karl Wilson, 1882-1975 | en | 2007-08-25 | ||||
| Music Notation and Terminology | Gehrkens, Karl Wilson, 1882-1975 | en | Musical notation; Music -- Terminology | 2006-10-08 |