Copernicus Publications is a publisher of science literature since 1994 and an Open Access publisher since 2001. They specialize in serving scientific associations in publishing and distributing their journals and play a role in the area of transparent Public Peer-Review.
Archive of back issues of core scholarly journals in the arts, business, humanities, sciences and social sciences. Does not provide the most current issues, usually has a rolling end date of 2-5 years.
Scitation, including SPIN (Searcheable Physics Information Notices) provides full-text access to journals published and distributed by the American Institute of Physics, American Physical Society, American Society of Civil Engineers, American Society of Mechanical Engineers International, International Society for Optical Engineering, and other science and engineering societies. Covers physics, astronomy, electronics, engineering, materials science, mathematics and associated disciplines.
Wiley is a web-based service that provides online access to nearly all of the 400 scientific, technical, medical and professional journals published by John Wiley & Sons. Full-text access to all journals is provided in PDF format and also in HTML for selected titles.
Science.gov searches over 60 databases and over 2,200 scientific websites to provide users with access to more than 200 million pages of authoritative federal science information including research and development results.