Source: Superman 187, 1966.
Source: Reprint story in "Superman's Pal, Jimmy Olsen" #131, 1970
Old World Hemisphere:
New World Hemisphere & Map Zooms:
Source: "Superman" #239, 1971
Source: Reprint story in "Superman's Pal, Jimmy Olsen" #131, 1970.
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Source: "Action Comics" #411, 1972
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Sources: "Action Comics" #336 and "Superman" #202
Source: "Adventure Comics" #390.