Classification
361 - Social problems & social welfare in general
363 - Other social problems & services
380 - Commerce, communications & transportation
610 - Medicine & health
000 - Computer science, information & general works
1
330 - Economics
1
333 - Economics of land & energy
1
400 - Language
1
612 - Human physiology
1
658 - General management
1
700 - The arts; fine & decorative arts
1