Platt, J. I. (1928). A series of elementary exercises upon geological maps. T. Murby ; Van Nostrand.
Dyfyniad Arddull ChicagoPlatt, John I. A Series of Elementary Exercises upon Geological Maps. London : New York: T. Murby ; Van Nostrand, 1928.
Dyfyniad MLAPlatt, John I. A Series of Elementary Exercises upon Geological Maps. T. Murby ; Van Nostrand, 1928.
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