Clapp, Sarah L. C. (November 1931), "The Beginnings of Subscription Publication in the Seventeenth Century", Modern Philology, 29 (2), Chicago: The University of Chicago Press: 199–224, doi:10.1086/387957, JSTOR433632, S2CID162013335
Clapp, Sarah L. C. (November 1931), "The Beginnings of Subscription Publication in the Seventeenth Century", Modern Philology, 29 (2), Chicago: The University of Chicago Press: 199–224, doi:10.1086/387957, JSTOR433632, S2CID162013335
Clapp, Sarah L. C. (November 1931), "The Beginnings of Subscription Publication in the Seventeenth Century", Modern Philology, 29 (2), Chicago: The University of Chicago Press: 199–224, doi:10.1086/387957, JSTOR433632, S2CID162013335