Subject
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2,575
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852
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846
History
767
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639
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358
Study and teaching
308
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295
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271
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269
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266
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226
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211
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206
Education
200
Social aspects
178
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165
Evaluation
164
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162
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154
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152
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145
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134
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129
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120
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115
Investigacion
110
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100
Knowledge, Theory of
95
Linguistics
86
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84
Study and teaching (Higher)
84
Management
83
Bibliography
77
Excavations (Archaeology)
76
Mathematical models
75
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75
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72
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69
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69
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68
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68
English language
67
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66
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66
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64
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63
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63
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57
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