Classification
170 - Ethics
304 - Factors affecting social behavior
100 - Philosophy & psychology
1
140 - Specific philosophical schools
1
320 - Political science
1
330 - Economics
1
331 - Labor economics
1
338 - Production
1
380 - Commerce, communications & transportation
1
381 - Commerce
1
410 - Linguistics
1
610 - Medicine & health
1