1) Primary sources are materials that were present during an event or time period and offer a first-hand view, while secondary sources are interpretations of primary sources found in publications like books and journals. 2) Databases contain published articles from magazines, newspapers, and academic journals that have been screened for valid research. 3) The library catalog lists all materials the library has available for research needs. 4) Databases and the catalog can be searched to find primary and secondary sources on topics and artists.