Subject headings are used to group similar material together in the NYPL catalog. Often researchers can begin with a keyword search, then click through the catalog record of related items to fish for relevant subject headings. For example, if a patron sought guidebooks about NYC architecture:
Use these subject headings to begin navigating the library catalog for material related to New York City guidebooks:
Alternatively, do an advanced catalog search using the keywords “New York Guidebooks” and input a date range under "Year:" to narrow the results.