Classification
330 - Economics
19
320 - Political science
12
333 - Economics of land & energy
6
360 - Social problems & services; associations
6
610 - Medicine & health
5
361 - Social problems & social welfare in general
4
380 - Commerce, communications & transportation
4
600 - Technology
4
616 - Diseases
4
300 - Social sciences
3
340 - Law
3
363 - Other social problems & services
3
617 - Surgery & related medical specialties
3
140 - Specific philosophical schools
2
720 - Architecture
2
005 - Computer programming, programs & data
1
025 - Library operations
1
304 - Factors affecting social behavior
1
336 - Public finance
1
350 - Public administration & military science
1
362 - Social welfare problems & services
1
364 - Criminology
1
370 - Education
1
618 - Gynecology, obstetrics, pediatrics & geriatrics
1