Axelrod, H. R. (1991). The atlas of discus of the world. Neptune, NJ: T.F.H. Publications.
Trích dẫn kiểu ChicagoAxelrod, Herbert R. The Atlas of Discus of the World. Neptune, NJ: T.F.H. Publications, 1991.
Deismireacht MLAAxelrod, Herbert R. The Atlas of Discus of the World. Neptune, NJ: T.F.H. Publications, 1991.
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