Objective-C:
http://developer.apple.com/techpubs/macosx/Cocoa/ObjectiveC/AppendixA/
Object-Oriented Programming: An Evolutionary Approach, by Brad J. Cox and Andrew J. Novobilski (Addison Wesley)
Objective-C: Object-Oriented Programming Techniques, by Lewis J. Pinson and Richard S. Wiener (Addison Wesley )
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