INSPEC
Citations from over 4000 journals and other publications in physics, electrical
engineering and electronics, computers and control, and information technology. |
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MEDLINE
Citations from approx. 8,400 journals in medicine, life science, and health
administration. |
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PATENTS
US Patent and Trade Office
and World Intellectual Property
Organization patent classification. |
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LCC
Library of Congress Classification in the Physical Sciences. |
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SIC
Standard Industrial Classification searched in natural
language queries. |
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