TY  - BOOK
AU  - Apel,Willi
TI  - The notation of polyphonic music, 900-1600
T2  - Mediaeval Academy of America. Publication
AV  - ML431 .A6 1961
U1  - 781.24 
PY  - 1953/// [i.e. 1961]
CY  - Cambridge, Mass.
PB  - Mediaeval Academy of America
KW  - Musical notation
KW  - Local
N1  - "Appendix: transcriptions": [30] p. at end
ER  -