2004-10-30/2020-04-09 - From the OHS PC Database. -- No notes
2018-05-07/2020-04-09 - The only DeGraff references to music found: 1) E. V. De Graff - arranger/music educator late 1800s, collector/editor of the Song Budget Music Series and The School Room Chorus 2) Melissa J. de Graaf - Assistant Professor of Musicology, University of Miami
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