This gem is tucked away on LL3 in Leyburn:
LOCATIONS    LEYBURN
CALL #       M2.I2 H42 1973.
AUTHOR       Idelsohn, A. Z. (Abraham Zebi), 1882-1938.
TITLE        Hebraisch-orientalischer melodienschatz
             Thesaurus of Hebrew Oriental melodies. Collected, classified and 
               edited by A. Z. Idelsohn.
IMPRINT      [New York] KTAV Publishing House, 1973.
DESCRIPT     10 v. in 4. music. 26 cm.
NOTE         Originally published 1923-32.
             The words of the songs are in Hebrew transliterated.
CONTENTS     v. 1. Songs of the Yemenite Jews.--v. 2. Songs of the Babylonian 
               Jews.--v. 3. Songs of the Jews of Persia, Bukhara and 
               Daghestan.--v. 4. Songs of the Oriental Sephardim.--v. 5. Songs
               of the Moroccan Jews.--v. 6. The synagogue songs of the German 
               Jews in the 18th century.--v. 7. The traditional songs of the 
               south German Jews.--v. 8. The synagogue song of the East 
               European Jews.--v. 9. The folk song of the East European Jews.-
               -v. 10. Songs of the Chassidim.
SUBJECT      Songs, Jewish.
             Folk-songs, Jewish.
             Jews --Music.
1 > Leyburn Library        M2.I2 H42 1973 v. 1            NOT CHK'D OUT
2 > Leyburn Library        M2.I2 H42 1973 v. 2            NOT CHK'D OUT
3 > Leyburn Library        M2.I2 H42 1973 v. 3            NOT CHK'D OUT
4 > Leyburn Library        M2.I2 H42 1973 v. 4            NOT CHK'D OUT