STATI UNITI (A. T., 127-146)
Roberto ALMAGIA
Fabrizio CORTESI
Mario SALFI
Piero LANDINI
Emilio MALESANI
Pino FORTINI
Emilio MALESANI
Alberto BALDINI
Carlo DE ANGELIS
Anna Maria RATTI
Gennaro [...] voll. 2; O. E. Baker, Agricultural regions of North America, in Economic Geography, 1926, pp. 459-493 The manufactural Geography of the Central Northwest of the United States, in S. of America, Washington, edited by authority of Congress; J. Bryce ...
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