Maps.com (Firm) & ebrary, Inc. (1999). The spread of agriculture. Maps.com.
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Dyfyniad Arddull Chicago
Maps.com (Firm) and Inc ebrary. The Spread of Agriculture. [S.l.]: Maps.com, 1999.
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Dyfyniad MLA
Maps.com (Firm) and Inc ebrary. The Spread of Agriculture. Maps.com, 1999.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.