Bremmer, R. H. (Rolf H. (2009). An introduction to Old Frisian : history, grammar, reader, glossary (1st ed.). John Benjamins Pub. Co. https://doi.org/10.1075/z.147
Hofmann, D., & Popkema, A. T. (2008). Altfriesisches Handwörterbuch. Universitätsverlag Winter.
Corpus Old Frisian The Corpus Oudfries/Old Frisian contains a large sample of the Old Frisian language from ca. 1200-1550, which has been lemmatized and PoS-tagged by Rita van de Poel as part of her PhD research. The corpus can be searched on three linguistic levels: words (as occurring in the text witness), lemmata and/or part-of-speech. The corpus has also been enriched with metadata (like dialect, region, date) made accessible through filtering and grouping options.
At this point in time the corpus Old Frisian contains 235,462 tokens, 177 text witnesses from 11 manuscripts (114 distinct texts).
Old Frisian Manuscripts
First Brokmer Codex (B1) - Oldenburg, Niedersächsisches Staatsarchiv
Second Brokmer Codex (B2) - Hanover, Niedersächsische Landesbibliothek
First Riustringen Codex (R1) - Oldenburg, Niedersächsisches Staatsarchiv
Second Riustringen Codex (R2) - Richthofen Collection - Leeuwarden
First Emsingo Codex (E1) - Groningen University Library
Second Emsingo Codex (E2) - Groningen University Library
Third Emsingo Codex (E3) - Richthofen Collection - Leeuwarden
Fivelgo Codex - Richthofen Collection - Leeuwarden
First Hunsingo Codex (H1) - Richthofen Collection - Leeuwarden
Second Hunsingo Codex (H2) - Richthofen Collection - Leeuwarden
Jus Municipale Frisonum - Richthofen Collection - Leeuwarden
Codex Unia - Bodleian Library, Oxford. Images and transcription http://tdb.fryske-akademy.eu/tdb/index-unia.html
Codex Aysma - Bodleian Library, Oxford.
Codex Roorda Richthofen Collection - Leeuwarden