Common Exhibitions of Henry Muhrmann and Leopold Gould Seyffert
Apr 27‒Jun 30, 1911
Fifteenth Annual Exhibition
Pittsburgh
:
Carnegie Institute
Apr 25‒Jun 30, 1912
Sixteenth Annual Exhibition
Pittsburgh
:
Carnegie Institute
Apr 24‒Jun 30, 1913
Seventeenth Annual Exhibition
Pittsburgh
:
Carnegie Institute
Apr 30‒Jun 30, 1914
Eighteenth Annual Exhibition
Pittsburgh
:
Carnegie Institute