400 JAAR VIOOLBOUWKUNST IN NEDERLAND : 400 YEARS OF VIOLINMAKING IN THE NETHERLANDS by Jaap Bolink et al., 1999, isbn 90-7297-782-3, Violin making and makers in the Netherlands 1599-1999, in Dutch and English
THE VIOLIN MAKERS OF THE LOW COUNTRIES by Max Moller, 1955, On instruments and makers from the 17th to early 20th century, in English , no 1097 of 1500
OVER DE VIOOL HAAR MAKERS EN VIRTUOZEN by Louis Couturier, 1946, About the Violin, its makers and virtuosos
DE STRIJKINSTRUMENTEN UIT EEN NATUURKUNDIG OOGPUNT BESCHOUWD by J W Giltay, 1916, Stringed instruments considered from a scientific perspective, re-bound
VIOLIN VARNISH Notes and articles from the workshop of Koen Padding, 2015
Letter: Roger Graham Hargrave (photocopy) (Jul 2 2025) Photocopy of letter by R. G. Hargrave dated July 2 2025