Tributes to Carl Engel: on the occasion of the Carl Engel Memorial Concert, given at the Coolidge Audiotorium in the Library of Congress, Washington, D.C., March 2, 1945
Herbert Putnam, Tributes to Carl Engel: on the occasion of the Carl Engel Memorial Concert, given at the Coolidge Audiotorium in the Library of Congress, Washington, D.C., March 2, 1945, Musical quarterly , XXXI(2), 1945, pp. 137-140