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Lua MLA (8ú heag.)Swegmark, Gunnar. On Human Ocular Accommodation: A Study of the Ciliary Muscle Activity Using a New Electrophysiological Method, with Special Reference to the Influence of Age. [s.n.], 1969.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.