Bibliography of Campbell, George Frederick, by subject:

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•	Language and languages (8)
•	Voyages autour du monde (4)
•	Voyages around the world (4)
•	English language -- Rhetoric (3)
•	English language -- Rhetoric -- Early works to 1800 (3)
•	Rhetoric -- Early works to 1800 (3)
•	Challenger, Expedition du,1872-1876 (3)
•	Challenger Expedition -- (1872-1876) (3)
•	Health education (Secondary) (2)
•	Shipping -- Great Britain -- History (2)
•	Clipper ships -- History (2)
•	Tea trade -- Great Britain -- History (2)
•	Youth -- Health and hygiene (2)
•	Health education -- Europe (2)
•	Challenger Expedition, 1872-1876 (2)
•	Challenger, Expédition du -- (1872-1876) (2)
•	Challenger Expedition,1872-1876 (2)
•	Health Education -- United States (2)
•	Health education (Elementary) (2)
•	Writing -- Handbooks, manuals, etc (2)

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