Mommsen, Theodor E. “PREFATORY NOTE.” The Rise of Universities, by Charles Homer Haskins, Cornell University Press, ITHACA; LONDON, 1957, pp. v-x, www.jstor.org/stable/10.7591/j.ctt5hh0nq.2. Accessed 23 Jan. 2021.
Mommsen, T. (1957). PREFATORY NOTE. In Haskins C. (Author), The Rise of Universities (pp. V-X). ITHACA; LONDON: Cornell University Press. Retrieved January 23, 2021, from http://www.jstor.org/stable/10.7591/j.ctt5hh0nq.2
Mommsen, Theodor E. "PREFATORY NOTE." In The Rise of Universities, by Haskins Charles Homer, V-X. ITHACA; LONDON: Cornell University Press, 1957. Accessed January 23, 2021. http://www.jstor.org/stable/10.7591/j.ctt5hh0nq.2.
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