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1931
January January 1931 21 (1): 1 - 114.	February February 1931 21 (2): 115 - 236.	March March 1931 21 (3): 237 - 328.
April April 1931 21 (4): 329 - 478.	May May 1931 21 (5): 479 - XXI.	June June 1931 21 (6): 605 - 714.
July July 1931 21 (7): 715 - 842.	August August 1931 21 (8): 843 - 976.	September September 1931 21 (9): 977 - 1090.
October October 1931 21 (10): 1091 - 1188.	November November 1931 21 (11): 1189 - 1300.	December December 1931 21 (12): 1301 - 1414.