Online Resources: There are several descriptions/explanations of coordinate systems available online, including:

Articles and Books: There are many articles and books on cartography and maps, including:

Bugayevskiy, L.M. and J.P. Snyder (1995) Map Projections: A Reference Manual, CRC Press.
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Jones, C. (1977) Geographical Information Systems and Computer Cartography, Prentice Hall.
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