Bibliography of Keller, Charles, by subject:

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•	Wit and humor, Juvenile (21)
•	Riddles, Juvenile (17)
•	Jokes (16)
•	Riddles (14)
•	Birds -- Indiana (5)
•	Bird watching -- Indiana (4)
•	American wit and humor (4)
•	Wit and humor (3)
•	Birds -- Indiana -- Indianapolis (2)
•	Outer space -- Wit and humor (2)
•	Puns and punning (2)
•	Knock-knock jokes (2)
•	Vegetables -- Juvenile humor (2)
•	Fruit -- Juvenile humor (2)
•	Bird watching -- Indiana -- Indianapolis -- Guidebooks (2)
•	Tongue twisters (2)
•	Inventions -- Caricatures and cartoons -- Juvenile literature (2)
•	Outer space -- Juvenile humor (2)
•	American wit and humor, Pictorial -- Juvenile literature (2)
•	Dinosaurs -- Wit and humor (1)

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