by COURANT, R. and HILBERT, D.
by SELWOOD, PIERCE W.
by MARKLEY, KLARE S.
by KAPPELMEIR, C. P. A.
by SCHEELE, MARTIN.
by Kolthoff, I. M. and Stenger V. A.
by SHERA, JESSE H.
by SHERA, J.H.
by LINGANE, JAMES J.
by Elving, P. J. and Kolthoff, I. M.
by GAYLORD, NORMAN G.