. . . "Nomination of Mon C. Wallgren. : Hearings, Eighty-first Congress, first session, on the nomination of Mon C. Wallgren to be chairman of the National Security Resources Board. February 17, 21, 24-25, 1949"@en . . "Nomination of Mon C. Wallgren. Hearings, Eighty-first Congress, first session, on the nomination of Mon C. Wallgren to be chairman of the National Security Resources Board. February 17, 21, 24-25, 1949" . . . . . . . . .