Apel, Willi, 1893–1988
Nationality: Undetermined, possibly 
(United States)
Identities and Authority Control
- Open Library: OL121832A
- pdbooks.info ID: 173229
Willi Apel Contributed to the Following:
| Title | Edition | Year of Publication | Role | Country of Publication | Possible Copyright Status | Available Online? | |||
|---|---|---|---|---|---|---|---|---|---|
|  |  | 
| ||||||
| Gregorian chant | 1958 | Author | |  | | | | ||
| The notation of polyphonic music, 900-1600 | 4th ed., rev. | 1949 | Author | |  | | | |    
|