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3,350
H - Social Science
188
B - Filosofia, Psicologia, Religió
70
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K - Law
45
T - Technology
43
R - Medicine
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Z - Library Science
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P - Language and Literature
39
G - Geography, Anthropology, Recreation
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F - General American History
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J - Political Science
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M - Music
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C - Historical Sciences
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S - Agriculture
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D - World History
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A - Treballs generalss
3