Classification
900 - History & geography
407
320 - Political science
160
330 - Economics
135
800 - Literature & rhetoric
70
300 - Social sciences
58
945 - Italian Peninsula & adjacent islands
39
700 - The arts; fine & decorative arts
36
410 - Linguistics
30
340 - Law
24
780 - Music
17
720 - Architecture
16
850 - Italian, Romanian & related literatures
16
820 - English & Old English literatures
15
100 - Philosophy & psychology
14
140 - Specific philosophical schools
14
400 - Language
14
851 - Italian poetry
14
940 - History of Europe
13
200 - Religion
9
271 - Religious orders in church history
9
380 - Commerce, communications & transportation
9
630 - Agriculture & related technologies
9
809 - History, description & criticism
9
853 - Italian fiction
9
333 - Economics of land & energy
8
370 - Education
8
520 - Astronomy & allied sciences
8
000 - Computer science, information & general works
7
576 - Genetics & evolution
7
500 - Natural sciences & mathematics
6
610 - Medicine & health
6
282 - Roman Catholic Church
5
016 - Bibliographies of works on specific subjects
4
170 - Ethics
4
272 - Persecutions in church history
4
297 - Islam, Babism & Bahai Faith
4
304 - Factors affecting social behavior
4
378 - Higher education
4
509 - Historical, geographic & persons treatment
4
840 - Literatures of Romance languages
4
871 - Latin poetry
4
909 - World history
4
938 - Greece to 323
4
261 - Social theology
3
305 - Social groups
3
324 - The political process
3
331 - Labor economics
3
530 - Physics
3
540 - Chemistry & allied sciences
3
616 - Diseases
3
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