Classification
304 - Factors affecting social behavior
2
320 - Political science
2
360 - Social problems & services; associations
2
361 - Social problems & social welfare in general
2
551 - Geology, hydrology & meteorology
2
155 - Differential & developmental psychology
1
330 - Economics
1
331 - Labor economics
1
334 - Cooperatives
1
341 - Law of nations
1
658 - General management
1