Classification
361 - Social problems & social welfare in general
330 - Economics
3
700 - The arts; fine & decorative arts
3
000 - Computer science, information & general works
2
333 - Economics of land & energy
2
380 - Commerce, communications & transportation
2
500 - Natural sciences & mathematics
2
610 - Medicine & health
2
900 - History & geography
2
140 - Specific philosophical schools
1
340 - Law
1
540 - Chemistry & allied sciences
1
576 - Genetics & evolution
1
620 - Engineering & allied operations
1