The Sandman at Don Markstein's Toonopedia: "Adventure Comics #40 wasn't quite the character's first appearance, though. The 1939 issue of New York World's Fair Comics, an extra-big anthology DC put out to capitalize on the eponymous event, contained a Sandman story, and probably hit the stands a week or two before his first Adventure story (though the one in Adventure is believed to have been written and drawn earlier)". Archived from the original December 5, 2011.
The Sandman at Don Markstein's Toonopedia: "Adventure Comics #40 wasn't quite the character's first appearance, though. The 1939 issue of New York World's Fair Comics, an extra-big anthology DC put out to capitalize on the eponymous event, contained a Sandman story, and probably hit the stands a week or two before his first Adventure story (though the one in Adventure is believed to have been written and drawn earlier)". Archived from the original December 5, 2011.
