Common Exhibitions of Johan Michiel Oort and Johanna Machwirth
Apr‒May 1907
Tentoonstelling van Kunstwerken Vervaardigd door Leden der Maatschappij
[Exhibition of Art Works Manifactured by Members of the Society]
Amsterdam
:
Amsterdam (exact location unknown)
Apr‒May 1909
Tentoonstelling van Kunstwerken
Amsterdam
:
Amsterdam (exact location unknown)