Where can I find a copy of a Thayer Engineering School thesis?
You can search the Library Catalog for Thayer theses with the keyword search
You can find print copies at Rauner Special Collections Library for Masters and Ph.D Theses.
Feldberg Business-Engineering Library also has print copies of Masters Theses, but Ph.D Theses are available only for 2003 and before.
You can find digital copies of Ph.D theses using Proquest's Dissertations & Theses @ Dartmouth College database.