Classification
150 - Psychology
616 - Diseases
3
100 - Philosophy & psychology
2
658 - General management
2
153 - Mental processes & intelligence
1
160 - Logic
1
302 - Social interaction
1
330 - Economics
1
380 - Commerce, communications & transportation
1
384 - Communications; telecommunication
1
500 - Natural sciences & mathematics
1
510 - Mathematics
1
700 - The arts; fine & decorative arts
1
800 - Literature & rhetoric
1
900 - History & geography
1