Het Zondagsblad. April 17: The final issue of the Belgian comics magazine Bravo! is published. April 25: The first issue of the Flemish children's magazine Pum-Pum is published. It will run until 11 January 1967. In Osamu Tezuka's Astro Boy story Captain Atom Professor Ochanomizu makes his debut. A-1 Comics (1944 series) #33 - Magazine Enterprises Action Comics (1938 series) #155 - DC Comics Adventure Comics (1938 series) #163 - DC Comics Adventures into Terror (1950 series) #103 - Atlas Comics Adventures Into the Unknown! (1948 series) #22 - American Comics Group Adventures of Bob Hope (1950 series) #8 - DC Comics Airboy (as Airboy Vol. 8) (1942 series) #3 - Hillman Periodicals All American Western (1948 series) #119 - DC Comics All Star Western (previously All Star Comics) (1948 series) #58 - DC Comics All-True Crime (1948 series) #45 - Atlas Comics Astonishing (1951 series) #3 - Atlas Comics Batman (1940 series) #64 - DC Comics Battle (1951 series) #2 - Atlas Comics Blackhawk (1944 series) #39 - Quality Comics Danger Trail (1950 series) #5 - DC Comics Detective Comics (1937 series) #170 - DC Comics Flash Gordon (1950 series) #5 - Harvey Publications Journey Into Unknown Worlds (1950 series) #5 - Atlas Comics Marvel Tales (1949 series) #103 - Atlas Comics Men Adventures (1949 series) #7 - Atlas Comics Mystery in Space (1951 series) #1 - DC Comics Two-Gun Kid (as Two-Gun Western) (1948 series) #6 - Atlas Comics Star Spangled Comics (1941 series) #115 - DC Comics Strange Adventures (1950 series) #7 - DC Comics Superman (1939 series) #69 - DC Comics Young Men (1949 series) #8 - Atlas Comics May May: Manuel Vázquez Gallego's La familia Cebolleta makes its debut in the first issue of El DDT. May 30: In Charles M. Schulz' Peanuts Schroeder makes his debut, though he will not be depicted playing piano until 24 September. A-1 Comics (1944 series) #34 - Magazine Enterprises Action Comics (1938 series) #156 - DC Comics Adventure Comics (1938 series) #164 - DC Comics Adventures Into the Unknown! (1948 series) #23 - American Comics Group Airboy (as Airboy Vol. 8) (1942 series) #4 - Hillman Periodicals All-Famous Crime (1950 series) #8 - Star Publications Amazing Detective Cases (1950 series) #6 - Atlas Comics Archie Comics (1946 series) #50 - Archie Publications Archie's Girls Betty and Veronica (1950 series) #9 - Archie Publications Archie's Pal Jughead (1949 series)