Character/Atlas Publishing
Kryptonian
Blak-Du was Jor-El's roommate at Krypton College, and was rated as scientifically brilliant.
Character history
Superboy
#121
1965-06-00
Teräsmiehen Poika
#8/1965
1965-08-00
Across the catalog
1949–1977
1 issue →
Superman Annual
1951–1970
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