Start in the library catalog
Browse the shelves
Books are organized on the shelves according to topic, so once you find a promising source, you can:
Bibliographic catalogs, as a print form, are lists of books. They are often published by museums and research universities and cover a collection that is unique to their institution.
While catalogues will not contain everything ever published on your topic, they can be useful for discovering the field, and finding rare or historic items based around a set of subjects.