David Gladfelter writes:

His 2012 entry in the Civil War Token Society Hall of Fame:

To read the complete article, see:
CWTS Hall of Fame : Donald Erlenkotter(http://cwtsociety.com/halloffame.shtml)

David Gladfelter adds:

John Ostendorf adds:

From the UCLA site:

To read the complete article, see:
Donald Erlenkotter(https://www.anderson.ucla.edu/faculty-and-research/decisions-operations-and-technology-management/faculty/erlenkotter)

FUN FACT:

To read the complete article, see:
The Pre-Shortzian Puzzle Project(http://www.preshortzianpuzzleproject.com/2015/11/)