Alvin Romaine Lamb · Andrew Corrie McCandlish · Irving E. Melhus · John Marcus Evvard · M. R. Tolstrup · R. W. Brown · Robert Lorenzo Webster · W. R. Hechler · William George Gaessler · Lawrence Wood Durrell · Martin Mortensen
yan 1919 · Agricultural Experiment Station, Iowa State College of Agriculture and Mechanic Arts