MATTIAS KLOTZ VON MITTENWALD by Adolf Layer, 1965, Biography of Matthias Klotz
LEOPOLD WIDHALM UND DER NURNBERGER LAUTEN UND GEIGENBAU IM 18. JAHRHUNDERT by Klaus Martius, 1997, isbn 3-923639-13-9, Biography, instrumentsand methods of the maker Leopold Widhalm and other 18th Century Nurnberg makers
INTERNATIONALER GEIGENBAU-WETTBEWERB "LOUIS SPOHR" KASSEL 1983 MIT BOGENMACHER-WETTBEWERB, 1983, Catalogue of the 1983 violin and bow making competition, soft bound
LAUTEN,HARFEN, VIOLINEN, TAGE ALTER MUSIK IN HERNE, 1984, Catalogue of intstrument making exhibition and concert December 1984, soft bound
ZWEITER DEUTSCHER GEIGENBAU-WETTBEWERB WEISBADEN, 1983, Catalogue of the 2nd German Violin making competition June 1983
WIESBADENER TAGE DER NEUEN GEIGE, 1992, Catalogue of the 1992 German Violin Making competition and exhibition, soft bound
GEIGENBAU HEUTE MÜNCHNER GEIGEN UND BOGENBAUER by Gunther Joppig, 1997, isbn 3-9804783-2-7, Munich violin and bow makiers exhibition and concerts April-May 1997, visitcard from Klaus Klepper with inscription by the author to Roger Hargrave
INTERNATIONALER GEIGENBAU-WETTBEWERB MITTENWALD 1989 by Helmut W Klinner (ed.), 1989, Exhibition catalogue of the competition, soft bound
"ERLESENE STREICHINSTRUMENTE" "RARE STRINGED INSTRUMENTS" by Renata Koeckert (ed.), Catalogue of thesStringed instrument dealer Renata Koekert
FRANZ GEISSENHOF by Rudolf Hopfner
Letter: Roger Graham Hargrave (photocopy) (Jul 2 2025) Photocopy of letter by R. G. Hargrave dated July 2 2025