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Peck, H. (1914). The Theme of Paradise Lost. PMLA, 29(2), 256-269. doi:10.2307/457078
Hanford, J. (1917). The Dramatic Element in “Paradise Lost”. Studies in Philology, 14(2), 178-195. Retrieved from http://www.jstor.org/stable/4171708
Peck, H. (1914). The Theme of Paradise Lost. PMLA, 29(2), 256-269. doi:10.2307/457078