Classification
355 - Military science
13
363 - Other social problems & services
9
327 - International relations
6
500 - Natural sciences & mathematics
5
330 - Economics
4
303 - Social processes
3
353 - Specific fields of public administration
3
358 - Air & other specialized forces
3
658 - General management
3
331 - Labor economics
2
382 - International commerce
2
623 - Military & nautical engineering
2
005 - Computer programming, programs & data
1
153 - Mental processes & intelligence
1
323 - Civil & political rights
1
342 - Constitutional & administrative law
1
364 - Criminology
1
368 - Insurance
1
384 - Communications; telecommunication
1
600 - Technology
1
620 - Engineering & allied operations
1
670 - Manufacturing
1
951 - China & adjacent areas
1
973 - United States
1