Portal of Astronomic information Strassbourg – portal of astronomy, astrophysics and of european observatories. It searches astronomical object (object identifiers), finds image, measurements and bibliography.
Commercial portal of photonics.
Portal of knowledge of physics. Provided by company About.com.
PhysNet offers country-wise lists of Physics departments and institutes, lists of documents, online literature, preprints, research reports etc., freely available Physics journals, conferences, jobs and other services.
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