1.   Title: Boy and girl
Institution: University of Saskatchewan Archives
Fonds/Collection: Hans Gruen fonds
2.   Title: Children
Institution: University of Saskatchewan Archives
Fonds/Collection: Hans Gruen fonds
3.   Title: Children
Institution: University of Saskatchewan Archives
Fonds/Collection: Hans Gruen fonds
4.   Title: Kotos
Institution: University of Saskatchewan Archives
Fonds/Collection: Hans Gruen fonds