GESCHICHTE DER GEIGENBAUKUNST IN DER SCHWEIZ by Hans Boltshauser, 1923, Dictionary of Swiss violinmakers with illustrations, Soft bound
DIE GEIGENBAUER DER SCHWEIZ by Hans Boltshauser, 1969, Dictionary of violin makers of Switzerland, in German
QUELQUE CONSIDERATION SUR L'ARCHET ET LES ARCHETIERS FRANCAIS by Pierre Vidoudez, History of French bow making and list of bow makers, Soft bound
DIE MAINZER GEIGENBAUER by Egmont Michels, 1995, isbn 3-87350-13-2, Biographies and instruments of makers of the Mainz region. In German.
DIE ALEMANNISCHE SCHULE ARCHAISCHER GEIGENBAU DES 17. JAHRHUNDERTS by Olga Adelmann, 1990, isbn 3-922378-10-2, 17th century violin making in the southern Black Forest and Switzerland
VIOLIN MAKING IN LYONS by Jean-Frederic Schmitt, 1993, Lyonnais violin makers , soft bound
SVENSK FIOLBYGGAR KONST by Bengt Nilsson, soft back good
Letter: Roger Graham Hargrave (photocopy) (Jul 2 2025) Photocopy of letter by R. G. Hargrave dated July 2 2025