Using Library Search (YouTube, 3m) provides an overview of how to use Library Search.
Find a map on a particular subject or area:
Limit to a particular time of publication:
Find a map with a particular scale:
Many maps belong to large national or international sets consisting of many sheets. To find these on Library Search you need to make your search geographically broad.
For example use
Most map sets have an index sheet, which accompanies the maps. This index sheet will help you to locate individual maps.
Maps may accompany books and journals. Large maps are often folded and kept in a pocket within books and journals. The Library Search record will include the note:
Maps can be located using printed or electronic indexes. Choose a database which covers your topic, for example try GeoRef for information in geology and the geosciences:
Some databases available at the Library which include maps are: