North America

"The material for this questionnaire has been derived from dialectal work sheets, especially from A Compilation of The Work Sheets of the Linguistic Atlas of the United States and Canada and Asociated Projects, personal inquiries, and with the invaluable aid of Dr. Zacharias Thundyil, asistant professor of English, at Northern Michigan University." (Peterson and Thundyil, 1971:4)

The lists were published in the Introduction to the Study of Indian Languages, supported by the Smithsonian Institution's Bureau of Ethnology. The 1880 edition is a second edition; the first appeared in 1877, but consists of only the schedules and a brief introduction.