Format
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1,282,541 results
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694,683 results
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82,286 results
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69,048 results
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44,221 results
Journal
37,474 results
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3,826 results
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3,274 results
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2,208 results
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1,335 results
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1,241 results
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1,022 results
Video
963 results
Statistics
729 results
Kit
693 results
Database
576 results
DVD
399 results
Unknown
379 results
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325 results
Cassette
313 results
Website
309 results
Data Medium
168 results
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111 results
Manuscript
96 results
Slide
52 results
Research Data
40 results
Braille
15 results
Software
5 results
Physical object
1 results