Classification
617 - Surgery & related medical specialties
297
616 - Diseases
131
006 - Special computer methods
24
610 - Medicine & health
12
620 - Engineering & allied operations
7
618 - Gynecology, obstetrics, pediatrics & geriatrics
4
612 - Human physiology
2
061 - Organizations in North America
1
150 - Psychology
1
304 - Factors affecting social behavior
1
613 - Personal health & safety
1
621 - Applied physics
1
700 - The arts; fine & decorative arts
1