World War, 1939-1945 -- Children's nonfiction. World War, 1939-1945 -- Miscellanea -- Juvenile literature. World War, 1939-1945 -- Secret service -- Children's nonfiction.

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World War, 1939-1945 -- Secret service -- Juvenile literature. Spies -- History -- 20th century -- Juvenile literature. Military intelligence -- History -- 20th century -- Juvenile literature.