美国国家环境出版物 U.S. Environmental Protection Agency美国环境保护署提供出版物搜索、预览和下载等服务 Website of the U.S. Environmental Protection Agency (EPA). EPA's mission is to protect human health and the environment.
DOAJ Directory of Open Access Journals开放存取期刊的索引平台,提供高质量、同行评议期刊 DOAJ is a unique and extensive index of diverse open access journals from around the world, driven by a growing community, committed to ensuring quality content is freely available online for everyone.
Frontiers Media SA FrontiersFrontiersMediaSA是同行评审的开放获取科学期刊的学术出版商,目前活跃于科学,技术和医学领域。它由一群神经科学家于2007年创立,后来扩展到其他学术领域。Frontiers总部位于瑞士洛桑 Open access publisher of peer-reviewed scientific articles across the entire spectrum of academia. Research network for academics to stay up-to-date with the latest scientific publications, events, blogs and news.
bioRxiv.org bioRxiv.org为生物学家专有的预印本文献库 bioRxiv - the preprint server for biology, operated by Cold Spring Harbor Laboratory, a research and educational institution