The first Beetle Bailey
comic book, Dell #469 shown above, was published on May 1, 1953. At that time it was part of the Dell Four Color Comics series, which ran alternating titles. Mort Walker drew all of the cover and interior pages (example on the right).
The next two Beetle Bailey
comics, Dell #521, dated December 1, 1953 and Dell #552 dated April 1, 1954, are shown below. Beetle Bailey
got his own comic book series with Dell beginning in 1956. – Brian Walker