Between 1969 and 1973 his work was exhibited in eight one-man shows in Detroit, New York, and in particular at John Hancock Center, Chicago, that had just been opened by that time.
Zwischen 1969 und 1973 wurde seine Arbeit in acht Einmann-Shows in Detroit, New York und insbesondere im John Hancock Center in Chicago, der zu dieser Zeit gerade eröffnet worden war, ausgestellt.