-EJournals
-Major Preprints

-Reference Resources
-Laboratories
-Data Sources

-Reference Resources
-Observatories
-Image Sources

Professional Societies:

• American Astronomical Society (AAS)
• American Institute of Physics (AIP)
• American Physical Society (APS)
• Astronomical Society of the Pacific (ASP)
• Institute of Physics (IOP)
• European Physical Society (EPS)
• Scholarly Societies Project - Astronomy - Links to websites of scholarly societies across the world in Astronomy; sponsored by University of Waterloo Library
• Scholarly Societies Project - Physics - Links to websites of scholarly societies across the world in Physics; sponsored by University of Waterloo Library

Commercial Publishers:

• Elsevier
• Springer Verlag
• Wiley Interscience