"Glass." . . "Spettroscopia ottica." . . "Glas." . . "LSR." . . "Physikalische Eigenschaft." . . . . "Livres électroniques" . . . . . . . . . . . . . . . . "Electronic books"@en . . . . . "Physics and chemistry of rare-earth ions doped glasses" . "Physics and chemistry of rare-earth ions doped glasses"@en . . . . . . "Electronic books." . . "Electronic books" . "Vetri - Proprietà ottiche." . . "Chemische Eigenschaft." . . "Laser spectroscopy." . . "Laser spectroscopy" . . . "Glass Optical properties." . . "Glass Optical properties" . "Rare earth ions." . . "Rare earth ions" .