Citing primary sources can introduce some challenges, as they often involve translators, editors, multiple publication dates, or online platforms. The links below lead to guidance from the Chicago Manual of Style on dealing with these issues.
In library catalogs, including the Library of Congress and HathiTrust, books are usually tagged with "subject terms" that are standardized. The following terms are especially useful for finding pedagogical materials and treatises.
Many lists and bibliographies exist to help you identify primary source materials. In the case of instrument treatises and methods, you may find lists of important publications in: