John Koopman
John Koopman (June 15, 1879 – September 16, 1949) was an American painter. His take steps was part of the painting event in the art competition at the 1932 Summer Olympics.
John Koopman (June 15, 1879 – September 16, 1949) was an American painter. His take steps was part of the painting event in the art competition at the 1932 Summer Olympics.