The following terms are found in the subject headings of records for published primary sources.
In the Library Catalog:
Use the BROWSE option, select SUBJECT from the drop-down menu.
Select "Advanced Keyword" and select SUBJECT from the drop-down menu.
Here are some ways to search for primary sources created before the nineteenth century.
The library holds many types of maps--topographic, military, railroad, urban, land use, ethnographic and linguistic--to name a few. Below are some sample searches, but this list is by no means comprehensive.
[insert place] -- Maps -- Facsimiles
Roads -- United States -- Maps
[insert place]--Aerial views
Chicago (Ill.) -- Zoning Maps
Indians of North America -- Maps
Railroads -- United States -- Maps
City planning--[insert place]--Maps
Maps are found in many formats, from single sheets to aerial photographs and dynamically-generated tables. Most of any big library’s maps are found in books and journal articles and are not cataloged separately. There is an index of maps in books and journals, but often it is not very complete. Subject and author searches are the commonest way to locate maps in books and journals. For example:
Author: Rand McNally & Company (commercial firm)
Author: Geological Survey (U.S.) (government agency)