Johnson, M.E. 1999.”Amos Eaton” in Garraty, J.A. and Carnes, M.C. (General Eds.), American National Biography, Oxford University Press, v. 7, p. 257-258.

Johnson, M.E. 1999.”Ebenezer Emmons” in Garraty, J.A. and Carnes, M.C.(General Eds.), American National Biography, Oxford University Press, v. 7, p. 507-508.

Johnson, M.E. 1999.”James Hall” in Garraty, J.A. and Carnes, M.C. (General Eds.), American National Biography, Oxford University Press, v. 9, p. 861-862.

Johnson, M.E. 1999.”William Williams Mather” in Garraty, J.A. and Carnes, M.C.(General Eds.), American National Biography, Oxford University Press, v. 14, p. 697-698.

Johnson, M.E. 1999.”Lardner Vanuxem” in Garraty, J.A. and Carnes, M.C.(General Eds.), American National Biography, Oxford University Press, v. 22, p. 253-254.

Johnson, M.E. 2003.  “William Amadeus Grabau (1870-1946)” in Middleton, G.V. (Editor), Encyclopedia of Sediments and Sedimentary Rocks.  Kluwer Academic Publishers, Dordrecht, pp. 643-644.