Classification
616 - Diseases
78
610 - Medicine & health
65
333 - Economics of land & energy
13
000 - Computer science, information & general works
9
618 - Gynecology, obstetrics, pediatrics & geriatrics
9
380 - Commerce, communications & transportation
8
580 - Plants (Botany)
8
700 - The arts; fine & decorative arts
8
611 - Human anatomy, cytology & histology
7
572 - Biochemistry
6
615 - Pharmacology & therapeutics
6
612 - Human physiology
5
140 - Specific philosophical schools
4
500 - Natural sciences & mathematics
3
570 - Life sciences; biology
3
571 - Physiology & related subjects
3
613 - Personal health & safety
3
614 - Incidence & prevention of disease
3
617 - Surgery & related medical specialties
3
540 - Chemistry & allied sciences
2
100 - Philosophy & psychology
1
363 - Other social problems & services
1
370 - Education
1
590 - Animals (Zoology)
1
600 - Technology
1
620 - Engineering & allied operations
1
800 - Literature & rhetoric
1