This collection is organized into 12 series spanning research on several languages over many years and including notebooks, file slips, sound recordings, loose notes, draft manuscripts, correspondence, conference materials, miscellaneous literature, and copies of the notebooks of other researchers. (Series are determined by the numbers following the collection identifier, for example, 2023-01.001.001 is Series 001, Item 001; 2023-01.002.001 is Series 002, Item 001, and so on.) Item-level metadata gives detailed information about the contents of and the relations among (different versions of) items, including crossreferences to relevant holdings of other repositories.
1. Field notebooks. Order of languages represented: Shoshoni, Mandan, Kiliwa, Paipai, Mojave, one notebook on Tibetan, one notebook on Haitian French Creole (latter two from field methods courses).
2. Course notebooks. In rough chronological order. Includes notes from Mixco's years as a student at UC Berkeley and also those from classes Mixco taught at the University of Utah.
3. File slips. Vocabulary and grammar file slips for several of the languages represented. Also some bibliographies in file slip form. Order of languages represented: Kiliwa, Cochimí, unknown languages (last two items are likely Yuman).
4. Sound recordings. Order of languages represented: Paipai, Somali, Haitian Creole (latter two from field methods courses).
5. Loose non-course notes. Loose paper notes largely relating to Mixco's work with Kiliwa and Paipai speakers.
6. Loose course notes. Loose paper notes from Mixco's BA and PhD education at UC Berkeley. Also contains loose paper materials from Mixco's time teaching classes at the University of Utah.
7. Secondary notes. Loose notes regarding metalinguistic observations on grammar (Kiliwa, Mandan), reading notes, and file directory printouts.
8. Draft manuscripts. Draft manuscripts and materials from papers and projects Mixco worked on.
9. Correspondence. Letters, emails, and other correspondence between Mixco and various parties.
10. Conference materials. Handouts, papers, and other materials from conferences Mixco attended and participated in.
11. Miscellaneous literature and newspapers.
12. Kennard and Hollow materials. Photocopies of materials from researchers Edward Kennard and Robert C. Hollow during their work with Mandan speakers.