Cofnodi Dyfyniadau
Dyfyniad APA
Wallis Hellen M. & Robinson Arthur Howard. (1987). Cartographical innovations. International Cartographic Association.
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Dyfyniad Arddull Chicago
Wallis Hellen M. and Robinson Arthur Howard. Cartographical Innovations. International Cartographic Association, 1987.
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Dyfyniad MLA
Wallis Hellen M. and Robinson Arthur Howard. Cartographical Innovations. International Cartographic Association, 1987.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.