http://dewey.info/scheme/e22/
300
Sciences sociales
380
Commerce, communications et transports
380
Commerce, communications et transports
381
Commerce intérieur
382
Commerce international
383
Postes
384
Communications; télécommunications
385
Transports ferroviaires
386
Transports par voies navigables intérieures et par ferries
387
Transports maritimes, aériens et spatiaux
388
Transports; transports terrestres
389
Métrologie et normalisation
Dewey Decimal Classification: Summaries
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