Classification
612 - Human physiology
500 - Natural sciences & mathematics
19
331 - Labor economics
10
302 - Social interaction
3
011 - Bibliographies
2
153 - Mental processes & intelligence
2
510 - Mathematics
2
611 - Human anatomy, cytology & histology
1
620 - Engineering & allied operations
1
629 - Other branches of engineering
1
658 - General management
1
770 - Photography, photographs & computer art
1