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2. Vitrectomy. A pars plana approach;Machemer;Trans. Am. Acad. Ophthalmol. Otolaryngol.,1971
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4. Vitrectomy via the pars plana. A new instrument system;O'Malley;Trans. Pac. Coast Otoophthalmol. Soc.,1972
5. A disposable vitrectomy instrument. The vitrophage;Peyman;Can. J. Ophthalmol.,1975