Chalwill, W. G. (1799). A dissertation on the sources of malignant bilious, or yellow fever, and means of preventing it:: Submitted to the examination of the Rev. John Ewing, S.T.P. provost; the trustees & medical faculty, of the University of Pennsylvania, on the sixth day of June, 1799, for the degree of Doctor of Medicine. Philadelphia:: Printed by Way & Groff, no. 48, North Third-Street..

Chalwill, William G. A Dissertation On the Sources of Malignant Bilious, or Yellow Fever, and Means of Preventing It:: Submitted to the Examination of the Rev. John Ewing, S.T.P. Provost; the Trustees & Medical Faculty, of the University of Pennsylvania, On the Sixth Day of June, 1799, for the Degree of Doctor of Medicine. Philadelphia:: Printed by Way & Groff, no. 48, North Third-Street., 1799.

Chalwill, William G. A Dissertation On the Sources of Malignant Bilious, or Yellow Fever, and Means of Preventing It:: Submitted to the Examination of the Rev. John Ewing, S.T.P. Provost; the Trustees & Medical Faculty, of the University of Pennsylvania, On the Sixth Day of June, 1799, for the Degree of Doctor of Medicine. Philadelphia:: Printed by Way & Groff, no. 48, North Third-Street., 1799.