Rotenstreich, Nathan. "Frontmatter". Humanism in the contemporary era, Berlin, Boston: De Gruyter Mouton, 1963, pp. 1-4. https://doi.org/10.1515/9783112320341-fm
Rotenstreich, N. (1963). Frontmatter. In Humanism in the contemporary era (pp. 1-4). Berlin, Boston: De Gruyter Mouton. https://doi.org/10.1515/9783112320341-fm