AGORHA, https://agorha.inha.fr/inhaprod/ark:/54721/002121135, date de consultation
: 2020/07/20.
Bergen University Library Picture Collection, http://marcus.uib.no/instance/person/f579ba5f-c11f-4951-bd5f-091c752e8f67,
date de consultation : 2020/07/20.
INHA, Fol Phot 46 (3), Calames-201979117312131