Julius Henry Dawes, Adrian P. Visocky, John Byron Stall, L. R. Hoover, Miguel A. Marino, Roger L. Thomas, Wyndham John Roberts, Michael Lee Terstriep, Douglas W. Hiestand, Illinois State Water Survey, Richard John Schicht · 1948
Julius Henry Dawes, Adrian P. Visocky, Harold W. Humphreys, John Byron Stall, L. R. Hoover, Miguel A. Marino, Robert Thomas Sasman, Sandor Csallany, Wyndham John Roberts, Michael Lee Terstriep, Douglas W. Hiestand, Gunnar Sigurdsson, Richard John Schicht, William Henry Baker, H. James Owen · 1969
