Common Exhibitions of Floris Hendrik Verster and Jacob Coenraad Ritsema

  • 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)