Two issues numbered v. 7, no. 20 (Apr. 18 and May 2, 1949). Vol. 10 begins with issue no. 2 (Aug. 6, 1951). Vol. 14, no. 15 (Feb. 4, 1952) incorrectly numbered no. 14, with Jan. 21 date on masthead. Two consecutive issues numbered v. 11, no. 12 (Jan. 5 and Jan. 19, 1953).