Basic background information and/or facts (i.e., mechanical properties)?
Refer to handbooks, dictionaries, and encyclopedias.
Studies on a research topic?
Find journal articles.
Procedures, specifications, or qualifications?
Use standards and handbooks.
Latest news and updates on research?
Find conference proceedings.
Details on inventions?
Look for patents.
Research data not found in published journals?
Check dissertations and theses.