Classification
361 - Social problems & social welfare in general
000 - Computer science, information & general works
1
304 - Factors affecting social behavior
1
320 - Political science
1
333 - Economics of land & energy
1
380 - Commerce, communications & transportation
1
540 - Chemistry & allied sciences
1
551 - Geology, hydrology & meteorology
1
630 - Agriculture & related technologies
1
700 - The arts; fine & decorative arts
1