Books also contain collections of primary sources such as letters or historical documents. Some strategies for locating these include:

• Add the keyword "sources" as a subject term to your search in the catalog 
• Add keywords for specific types (e.g. letters, correspondence, diaries) of primary sources to your search terms in databases or the library catalog
• Use the date limiter to focus on the time period of interest to you
• Peruse bibliographies of articles and books you find for references to primary sources and then do a title search in the library catalog for any specific primary sources or collections of primary sources that you see cited elsewhere
• When searching databases for articles, notice any book reviews that are included in your results list
• Check the subject headings associated with any relevant sources you find. Some of these may include terminology that will help you to locate primary sources.