
#4
Mar 1954
Catalog data from Metron and the Grand Comics Database is licensed CC BY-SA 4.0 and was normalized by The Collector. Cover images belong to their publishers.

#6
Sep 1954
Who made the most issues of this run, with the issues they span.
Who appears most often in this run, by issues they appear in.
The three Tweety and Sylvester issues of Four Color (Dell, 1942 series), #406, 489, and 524, were counted by Dell as the first three issues of this series.
The feature continued in Tweety and Sylvester (Western, 1963 series) #1.
From the Grand Comics Database.