The ArticlesPlus search engine is a useful tool for retrieving reference entries online from a variety of publishers. Most are authored entries with bibliographies to help you find additional sources.
Do a search in ArticlesPlus the way you normally would, for your person, place, or topic of interest. Next, scroll through the options for limiting your results on the left side of the screen. Under format, you will see format types that come up most frequently in your search results, e.g., "books," "newspapers," etc. Click on "more" in this list, then click on "reference" to see reference entries only.