|General Note:|| Edited by Allen Johnson and others.
''Published under the auspices of the American council of Learned Societies.''
Reprint of the original 20 vol. ed. published 1928-37 with supplementary v. 21-22 which were added in 1944 and 1958.
''Volume I contains corrections of fact and additional data which have come to the attention of the editors from the first publication of the work up to the present.''
Vol. 11: Supplement 1, to Dec. 31, 1935. Supplement 2, to Dec. 31, 1940.