Classification
330 - Economics
85
320 - Political science
27
333 - Economics of land & energy
20
700 - The arts; fine & decorative arts
15
363 - Other social problems & services
13
600 - Technology
11
000 - Computer science, information & general works
10
610 - Medicine & health
10
340 - Law
9
370 - Education
8
140 - Specific philosophical schools
6
300 - Social sciences
6
301 - Sociology & anthropology
6
304 - Factors affecting social behavior
6
900 - History & geography
6
551 - Geology, hydrology & meteorology
5
580 - Plants (Botany)
5
380 - Commerce, communications & transportation
4
540 - Chemistry & allied sciences
4
100 - Philosophy & psychology
2
336 - Public finance
2
500 - Natural sciences & mathematics
2
581 - Specific topics in natural history
2
615 - Pharmacology & therapeutics
2
620 - Engineering & allied operations
2
986 - Colombia & Ecuador
2
303 - Social processes
1
325 - International migration & colonization
1
327 - International relations
1
339 - Macroeconomics & related topics
1
361 - Social problems & social welfare in general
1
362 - Social welfare problems & services
1
398 - Folklore
1
400 - Language
1
410 - Linguistics
1
414 - Phonology & phonetics
1
530 - Physics
1
598 - Birds
1
800 - Literature & rhetoric
1
930 - History of ancient world to ca. 499
1