On sale date as listed in the Catalog of Copyright Entries, 1949 Pamphlets, Serials, Contributions to Periodicals, page 392 as stated: Bushmiller, Ernie Paul. Nancy and Sluggo. No. 16 1 v., illus. (c)United Feature Syndicate, inc.; 6 May 1949; registration number AA132122.
The title in the indicIa is "Nancy-Sluggo".