Southeast Asia Digital Library CatalogueThe Southeast Asia Digital Lbirary provides open-access to books, articles, pictures, audio-visual, and archival materials about eleven countries in Southeast Asia. It also include many useful links and outcomes of relevant research projects.
Internet ArchiveVery useful source of known titles in digitized form. Contains much redundancy so that you can view the same edition from multiple libraries (so if a page is obscured in one, check another).
Southeast Asia Library - Cornell University
The John M. Echols Collection on Southeast Asia from the Cornell University is probably the most comprehensive collection in North America on Southeast Asia. The library collection is especially rich with audio-visual materials, archives, pictures, and manuscripts.