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1 Text (45844115)
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11 Book (7623223)
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111 Book part (24030774)
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12 Journal/Newspaper (6780982)
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121 Article contribution (203378415)
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122 Other non-article (2930973)
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13 Conference object (16563244)
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14 Report (11588841)
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15 Review (3919549)
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16 Course material (638098)
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17 Lecture (412689)
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18 Thesis (7539426)
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181 Bachelor's thesis (3327013)
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182 Master's thesis (3101128)
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183 Doctoral and postdoctoral thesis (3367844)
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19 Manuscript (2199656)
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1A Patent (144777)
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2 Musical notation (236416)
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3 Map (496743)
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4 Audio (815880)
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5 Image/Video (3237)
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51 Still image (19525097)
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52 Moving image/Video (700937)
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6 Software (820252)
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7 Dataset (21483461)
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F Unknown (28331230)