Superstar Group, established in 1993, is the world's largest provider of Chinese digital book resources.
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The IOP ebooks™ collection brings together innovative digital publishing with leading authors from across the physical sciences.
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The Nature Portfolio is a collection of interdisciplinary research and review journals dedicated to understanding, exploring, and sharing science since 1869.
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The Oxford English Dictionary Online offers users the most complete, up-to-date, and extensive dictionary from Oxford.
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PNAS: Proceedings of the National Academy of Sciences of the United States of America（P-ISSN 0027-8424; E-ISSN 1091-6490）《The Proceedings of the National Academy of Sciences was founded in 1914 and
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Science has been at the center of important scientific discovery since its founding in 1880—with seed money from Thomas Alva Edison.
