[Italian naturalist travelers in the first half of                   the 19th century: problems and cases].
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D036262:Empirical Research; D005101:Expeditions / Q000191:economics / Q000266:history / Q000523:psychology; D005106:Exploratory Behavior / Q000502:physiology; D049672:History, 19th Century; D007558:Italy / Q000208:ethnology; D019021:Natural History / Q000193:education / Q000266:history; D012108:Research Personnel / Q000191:economics / Q000193:education / Q000266:history / Q000523:psychology; D014195:Travel / Q000191:economics / Q000266:history / Q000523:psychology