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Access codes Access codes that are purchased from sellers other than Pearson carry a higher risk of being either the wrong ISBN or a previously redeemed code. Check with the seller prior to purchase. 0134867467 / 9780134867465 MasteringGeography with Pearson eText -- Standalone Access Card -- for Elemental Geosystems, 9/e Package consists of: 0134818407 / 9780134818405 MasteringGeography -- Pearson eText 2.0 Upgrade -- for Elemental Geosystems, 9/e 0134818539 / 9780134818535 MasteringGeography Content -- Access Card Package Sales Accumulator -- for Elemental Geosystems, 9/e.