1. Observations on vision Author(s): Joslin, Benjamin F. (Benjamin Franklin), 1796-1861 Publication: Philadelphia : Printed by Joseph R.A. Skerrett, 1831 Subject(s): Vision, OcularOcular Physiological PhenomenaRetinal Diseases -- physiopathology
2. Observations on vision Author(s): Hosack, David, 1769-1835 Publication: New-York : Printed by C.S. Van Winkle ..., 1813 Subject(s): Vision, Ocular
