This catalog contains descriptions of maps, engineering, architectural and mechanical drawings, as well as references to specifications, and surveyors' notebooks. It includes materials prepared by railroads, the California State Railroad Museum, manufacturing companies, and individuals.

The results of a search are displayed by corporate name, and then by drawing number, and then by date.

In the Filing Location field, the code "WS" or a four-digit tube number indicates the material is stored off-site. Please contact the Library in advance of your visit to allow sufficient time for retrieval.