Centaur, 1938 Series
 
Keen Detective Funnies #8
Keen Detective Funnies #9
Issue v1#9
September 1938
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Keen Detective Funnies #10
Keen Detective Funnies #11
Keen Detective Funnies #1
Keen Detective Funnies #2
Keen Detective Funnies #3
Keen Detective Funnies #4
Keen Detective Funnies #5
Keen Detective Funnies #6
Keen Detective Funnies #7
Keen Detective Funnies #8
Keen Detective Funnies #9
Issue v2#9
September 1939
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Keen Detective Funnies #10
Keen Detective Funnies #11
Keen Detective Funnies #12
Keen Detective Funnies #1
Keen Detective Funnies #18
Keen Detective Funnies #19
Keen Detective Funnies #20
Keen Detective Funnies #21
Keen Detective Funnies #22
Keen Detective Funnies #23
Keen Detective Funnies #24
Issue 24
September 1940
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