DURNBAUGH, Donald F. Holy Cow!: The Unlikely Development of a Highly-Recognized Voluntary Agency—Heifer International. Yearbook of German-American Studies, [S. l.], v. 39, p. 93–104, 2004. DOI: 10.17161/ygas.v39i.19020. Disponível em: https://journals.ku.edu/ygas/article/view/19020. Acesso em: 9 apr. 2025.