Columbia subject headings:
Children with disabilities.
Pennsylvania Training School for Feeble-Minded Children.
People with mental disabilities--Education--Pennsylvania.
Harvard subject headings:
Children with mental disabilities--Education
Medical photography.
Pennsylvania Training School for Feeble-minded Children.
Princeton subject headings:
Exceptional children.
Gutekunst, Frederick, 1831-1917.
Parrish, Joseph, 1818-1891.
Pennsylvania Training School for Feeble-Minded Children.
Special education--Pennsylvania--History--19th century.