On deaf-mutism and the method of educating the deaf and dumb
By: by Laurence Turnbull, M.D., physician to the Department of the Eye and Ear of Howard Hospital, Philadelphia
Publisher: s.n.
Published: 1874
Place of publication: Philadelphia
Language: eng
Subjects: Deaf; Education
Notes: Caption title.

"(Extracted from the Transactions of the Medical Society of the State of Pennsylvania.)".

Turnbull cites sources from 1874, but not later.