Daniel F. (1965). General sciences for tropical schools: : for tropical schools (2nd edition.). Hong Kong: Oxford University Press.
Trích dẫn kiểu ChicagoDaniel F. General Sciences for Tropical Schools: : For Tropical Schools. 2nd edition. Hong Kong: Oxford University Press, 1965.
Deismireacht MLADaniel F. General Sciences for Tropical Schools: : For Tropical Schools. 2nd edition. Hong Kong: Oxford University Press, 1965.
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