NELSON, Clifford L.; WHAPLES, Gene C. Using Telephone To Increase Response To Questionnaires. Journal of Agricultural Education, [S. l.], v. 17, n. 1, p. 10–11, 1976. DOI: 10.5032/jaatea.1976.01010. Disponível em: https://jae-online.org/index.php/jae/article/view/1745. Acesso em: 12 jul. 2024.