Eric Hansen (USA) - kontrabas
Ewa Warykiewicz (Polska/Niemcy) - fortepian
World Bass Festival 2014 Wrocław
ML 128 .S7, ML 128 .V4, ML 128 .V5 - Bibliographies for selected string instruments (Reference collection) -- others also in alphabetical order
ML 882-927 - String instruments - History and criticism (includes construction)
MT 259-338 - Instrumental technique and study of string instruments