1. On cataract extraction without iridectomy Author(s): Knapp, Herman, 1832-1911 Publication: [New York : G.P. Putnam's Sons, printers, 1887?] Subject(s): Cataract Extraction -- methodsTreatment Outcome
2. Report on a second series of one hundred successive cataract extractions without iridectomy Author(s): Knapp, Herman, 1832-1911 Publication: New York : G.P. Putnams's Sons, [1889?] Subject(s): Cataract Extraction -- methodsTreatment Outcome
