Margret Köll — Book excerpts

Harfen

The harp catalogue of the Berlin Musical Instrument Museum.
By Dagmar Droysen-Reber
Berlin, 1999

L’ Arpa di Laura

Indagine organologica, artistica e archivistica sull’arpa estense.
By Elio Durante, Anna Martellotti
S.P.E.S., Firenze, 1982