UCLA's Digital Library Collections is made up of primary sources that have been digitized, annotated with meta-data, and put online.
You will also find links to the items and collections in the UCLA Library catalog, or, you can search the interface directly.
Digital humanities scholars seek primary sources because we engage directly with evidence and artifacts: interpreting, reinterpreting, or analyzing collections of primary sources. We often work closely with digital libraries, partnering with them to collect, process, and eventually publish primary resources with our scholarly analyses or essays.
DH scholars think of libraries as laboratories: and often engage with librarians, as directly as possible, in all phases of the research process. Digital Humanities projects often involve teams of scholars and staff with different areas of expertise. We think of libraries as laboratories -- where we work together.
Libraries tend to collect resources from local areas, but UCLA, because Los Angeles is a global city, has collections for around the world. In any case, you can structure your seach for primary sources based on concentric circles, from local to global.