STUDY OF "PURE" KTaO3 AND KTN SINGLE CRYSTALS BY THERMAL CONDUCTIVITY MEASUREMENTS DOWN TO 50 mK B. Salce, A.M. De Goër et L.A. Boatner J. Phys. Colloques, 42 C6 (1981) C6-424-C6-426 DOI: 10.1051/jphyscol:19816124