UNH Library (Durham) home page: https://www.library.unh.edu
Library Catalog (link on menu) - Use this to find online and physical material you can get directly through the UNH libraries (Durham, Law, Manchester). Ex.: books and journals, conference proceedings, audio-visual content, maps, newspapers, theses, more.
The Advanced Search gives you more options for setting up your search; select the Library Catalog.
The other two catalogs on the library homepage are both ways to search WorldCat, a search over 1000+ academic and major public libraries, including UNH. Use these if you have a long term project where you must consult a wide range of books not always available at UNH and for convenient InterLibrary Loan requests for books and media. Firstsearch allows more precise searches, while Books & Media Worldwide is nice if you do not like busy screens.
General search hints:
Advanced Search example:
Author (contains): aviado, k* [remember, the asterisk allows for any ending - so this can search for the initial and/or the full first name]
A guide to the physical environment of New Hampshire / by William J. Taffe & John E. Ross [Book with map, print]
Roadside geology of Vermont and New Hampshire / Bradford B. Van Diver [Book in print with online substitute from HathiTrust Emergency Temporary Access Service]