title: [ELECTRON MICROSCOPIC STUDIES ON THE PROBLEM OF PHOTORECEPTORS].
mesh_terms: D000818:Animals; D001001:Anura; D004583:Electrons; D008027:Light; D008853:Microscopy; D008854:Microscopy, Electron; D010870:Pineal Gland; D012106:Research; D012160:Retina; D011984:Sensory Receptor Cells
keywords: EXPERIMENTAL LAB STUDY; FROGS; LIGHT; MICROSCOPY, ELECTRON; PINEAL BODY; RECEPTORS, NEURAL; RETINA
vernacular_title: ELEKTRONENMIKROSKOPISCHE UNTERSUCHUNGEN ZUR FRAGE DER PHOTOREZEPTOREN.