| Betts, LaVera | Dicionário parintintín-português, português-parintintín | 1981 | | Linguistics |
| Pease, Helen; Betts, LaVera | Tikwaha Ikwatijara [1-7] | 1972 | | |
| Betts, LaVera | Parintintin Discourse | 2008 | | Linguistics |
| Pease, Helen; Betts, LaVera | Orekwatijar | 1962 | | |
| Pease, Helen and LaVera Betts | Parintintin phonology | 1971 | SIL International Publications in Linguistics | Linguistics |
| Betts, LaVera | Connectives in Parintintín | 1973 | | Linguistics |
| Betts, LaVera, compiler | Kagwahiva Dictionary | 2012 | | Linguistics |
| Pease, Helen; Betts, LaVera | Morog̃ita | 1966 | | |
| Pease, Helen; Betts, LaVera | Tenharim Museu Wordlist [1] | 1968 | | Language Assessment, Linguistics |
| Betts, LaVera | Observations of a Death among the Tenharim Tribe | 1977 | | Anthropology |
| Pease, Helen; Betts, LaVera | Histórias de Kairana | 1976 | | Linguistics |
| Pease, Helen; Betts, LaVera | História de Manuel João | 1977 | | Linguistics |
| Betts, LaVera | Transcriptions of Recordings of Parintintín Texts | 1967 | | Linguistics |
| Betts, LaVera, compiler | Exemplos do dicionário Parintintín-Português Português-Parintintín | 2008 | | Linguistics |
