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The Cold War pigeon patrols and other animal spies
- "Not all spies walk on two legs, some of history's most successful sleuths fly, bark, and swim. Animals have become undercover heroes in the military, on the police force, and even in the CIA!"
- "Juvenile works"
- "Juvenile works"@en
- "The Cold War pigeon patrols and other animal spies"
- "The Cold War pigeon patrols and other animal spies"@en