From the paper Volts and Jolts August, 1973.
A perfect picture showing the threshing process. Note the steel wheels on the tractor and horses pulling the wagons. Pictured are the late Eunice Green, Hans Haarstad, Conrad Vigen, Verne Green, Ray Hendrickson, the late Carl Green, and Otto Haarstad. Busy on the stack is Norman Rokke. Vigen and Hendrickson did custom threshing in those days (1930's)