382 - International commerce 37
940 - History of Europe 18
942 - England & Wales 15
330 - Economics 11
387 - Water, air & space transportation 8
380 - Commerce, communications & transportation 6
386 - Inland waterway & ferry transportation 6
954 - South Asia; India 6
325 - International migration & colonization 4
341 - Law of nations 4
388 - Transportation; ground transportation 4
910 - Geography & travel 4
943 - Central Europe; Germany 4
327 - International relations 3
338 - Production 3
913 - Geography of & travel in ancient world 3
917 - Geography of & travel in North America 3
352 - General considerations of public administration 2
383 - Postal communication 2
385 - Railroad transportation 2
962 - Egypt & Sudan 2
966 - West Africa & offshore islands 2
320 - Political science 1
322 - Relation of state to organized groups 1
336 - Public finance 1
353 - Specific fields of public administration 1
354 - Administration of economy & environment 1
509 - Historical, geographic & persons treatment 1
627 - Hydraulic engineering 1
634 - Orchards, fruits & forestry 1
912 - Atlases, maps, charts & plans 1
939 - Other parts of ancient world to ca. 640 1
941 - British Isles 1
947 - Eastern Europe; Russia 1
952 - Japan 1
953 - Arabian Peninsula & adjacent areas 1
956 - Middle East (Near East) 1
959 - Southeast Asia 1
960 - History of Africa 1
971 - Canada 1
977 - North central United States 1
986 - Colombia & Ecuador 1