Classification
580 - Plants (Botany)
333 - Economics of land & energy
12
330 - Economics
10
363 - Other social problems & services
10
630 - Agriculture & related technologies
10
000 - Computer science, information & general works
8
551 - Geology, hydrology & meteorology
8
600 - Technology
6
610 - Medicine & health
6
700 - The arts; fine & decorative arts
5
320 - Political science
4
581 - Specific topics in natural history
4
620 - Engineering & allied operations
4
520 - Astronomy & allied sciences
3
658 - General management
3
140 - Specific philosophical schools
2
304 - Factors affecting social behavior
2
340 - Law
2
380 - Commerce, communications & transportation
2
720 - Architecture
2
100 - Philosophy & psychology
1
200 - Religion
1
370 - Education
1
410 - Linguistics
1
576 - Genetics & evolution
1
800 - Literature & rhetoric
1
900 - History & geography
1