If you want to find material (like books) on Native American studies in the library catalog, a keyword search for “Native Americans” would be far too general.
More often than not, a subject search will be more precise. However, for Native American studies the phrase "Native American" will unfortunately not yield many results because the schema developed by the Library of Congress Subject Headings was created between 1898 and 1912. Instead, you will need to start by using "Indian”.
Here's a list of terms that will yield results in library catalogs, including the Yale Library catalog. Use these terms to search by subject using Advanced Search in Orbis.
There are also narrower terms you can search by subject for, including:
Find answers to common questions, discover solutions to common problems, and more!