HEATKEYS

Providing researchers with access to millions of scientific documents from journals, books, series, protocols and reference works.

IEEE Xplore. Delivering full text access to the world

www.acm.org - The premier society in computing brings you the Computer Portal.

PLoS ONE: an inclusive, peer-reviewed, open-access resource from the PUBLIC LIBRARY OF SCIENCE. Reports of well-performed scientific studies from all disciplines freely available to the whole world.

无忧文书写作修改中心是一家新型的留学文书写作修改的专业机构, 以全新的方式从事留学申请材料 的写作翻译以及修改润色服务.本中心自成立以来一直致力从向广大留学申请者提供最优质...