http://viaf.org/viaf/7577833 http://viaf.org/ conventionDeclaration detailLevel http://ica-atom.org/doc/RS-2#5.4 Full person Altena, Maarten 1943- conventionDeclaration 1943- Improv. Fest; (06) Maarten van Regteran; Altena; (07) Altena, Derek Bailey (2 of 2)-001 Improv. Fest; (06) Maarten van Regteran; Altena; (07) Altena, Derek Bailey (2 of 2)-002 Improv. Fest; (06) Maarten van Regteran; Altena; (07) Altena, Derek Bailey (2 of 2)-003 Improv. Fest; (06) Maarten van Regteran; Altena; (07) Altena, Derek Bailey (2 of 2)-004