ROBBINS, Edith. Friedrich Hedde: Grand Island’s Forty-Eighter, Pioneer and Leader. Yearbook of German-American Studies, [S. l.], v. 20, p. 97–104, 1985. DOI: 10.17161/ygas.v20i.19356. Disponível em: https://journals.ku.edu/ygas/article/view/19356.. Acesso em: 19 may. 2024.