One of the most important steps in research is to select the appropriate database for your topic. There are many different kinds of databases out there but you're looking for a bibliographic-type resource that covers the literature of a field. The following databases provide comprehensive coverage for physics.
The following journals provide comprehensive coverage for physics.
The following websites provide data, reports, and other information from government and professional agencies.
The following reference works can help you gain a basic understanding of key terms and ideas in your topic. They are also a great resource to learn search terms for your research.