City Readers Digital Historic Collections at the New York Society Library
An inaugural dissertation on opium. Submitted to the examination of John Ewing, S.T.P. provost; and to the trustees and medical professors of the University of Pennsylvania; for the degree of Doctor of Medicine: on the second day of May, A.D. 1792. By Valentine Seaman, o New-York.
Philadelphia: Printed by Johnston and Justice, at Franklin’s Head, no. 41, Chesnut-Street , 1792.