Newcomb, D. (1806). An inaugural essay on the different theories that have been advanced on the subject of the proximate cause of conception in the human female. Philadelphia: printed by John H. Oswald.

Newcomb, Daniel. An Inaugural Essay On the Different Theories That Have Been Advanced On the Subject of the Proximate Cause of Conception in the Human Female. Philadelphia: printed by John H. Oswald, 1806.

Newcomb, Daniel. An Inaugural Essay On the Different Theories That Have Been Advanced On the Subject of the Proximate Cause of Conception in the Human Female. Philadelphia: printed by John H. Oswald, 1806.