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Apple MacBook Pro 13", Core 2 Duo 2.53GHz, Mid 2009, 750GB HDD 4GB RAM, A1278 | eBay
MacBook Pro review (13-inch, Mid 2009) | Macworld
Apple Macbook Pro 13 - Late 2009 Reviews, Pros and Cons | TechSpot
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MacBook Pro: How to remove or install memory - Apple Support