Getting Started with Reference Sources
Subject Headings Used in Library Catalogs
Use the Salem State/NOBLE Catalog http://www.salemstate.edu/library/3828.php to search for books at SSU and nearby libraries.
The link below takes you to a list of subject headings for the Vietnam War. Scroll down until you find one that fits your topic. Then click on it to see the books available to you. You can also use keywords to find books, or if you know the author or title, use those.