Classification
330 - Economics
34
333 - Economics of land & energy
26
320 - Political science
15
363 - Other social problems & services
11
900 - History & geography
7
304 - Factors affecting social behavior
6
700 - The arts; fine & decorative arts
6
800 - Literature & rhetoric
5
610 - Medicine & health
4
200 - Religion
3
336 - Public finance
3
340 - Law
3
400 - Language
3
956 - Middle East (Near East)
3
297 - Islam, Babism & Bahai Faith
2
300 - Social sciences
2
301 - Sociology & anthropology
2
370 - Education
2
410 - Linguistics
2
720 - Architecture
2
770 - Photography, photographs & computer art
2
140 - Specific philosophical schools
1
338 - Production
1
339 - Macroeconomics & related topics
1
380 - Commerce, communications & transportation
1
398 - Folklore
1
576 - Genetics & evolution
1
581 - Specific topics in natural history
1
780 - Music
1
820 - English & Old English literatures
1