TY  - BOOK
AU  - Vollaerts, J. W. A. 
TI  - Rhythmic proportions in early medieval ecclesiastical chant
PY  - 1958///
CY  - Leiden
PB  - Brill
KW  - Chants (Plain)
KW  - History & criticism
KW  - Musical meter & rhythm
N1  - Includes index
ER  -