[2] In 1943, Yava provided the Hopi-language text for two bilingual children's books published by the Bureau of Indian Affairs: Field Mouse Goes To War / Tusan Homichi Tuvwöta and Little Hopi / Hopihoya.

[3] After World War II, the BIA's emphasis shifted back to assimilation and further efforts at bilingual education would not be made for several decades.

[1] From 1969–1977, Yava met with anthropologist Harold Courlander to record recollections of his life, Hopi and Tewa history and traditions, and current issues affecting the community such as the Hopi–Navajo land disputes.

These recordings were transcribed and edited by Courlander and published in the book Big Falling Snow: A Tewa-Hopi Indian's Life and Times and the History and Traditions of His People in 1978.

An obituary in the International Journal of American Linguistics praised his language skills, calling him a "remarkable man".