Listed in Overstreet Price Guide and on some other sites as Movie Comics #30023-501
But correct title is listed here.
The production Code #30023-501 is used to differentiate the various editions.
Movie adaptation of the Disney classic that stared Julie Andrews as Mary Poppins and Dick Van Dyke as Bert. Based on the original stories by P.L. Travers; Reprinted: in Walt Disney Showcase (Gold Key, 1970 series) #17 (August 1973)