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The on-sale date from the publication date, given as the date of copyright, as reported to the U.S. Copyright Office in the Catalogue of Copyright Entries, Part 1, Group 1, Books, New Series, Volume 27, Group 1, For the Year 1930, no. 138, February 1931, pp. 2070. Two copies and affirmed arrival at the Copyright Office on November 20, 1930. Copyright number A 31164. Copyright Coward-McCann, Inc. (30-32700).