TY - RPRT TI - Moessbauer study of low-temperature anharmonicity in ThO2-Co57 AU - Dash, J. G. AU - Erickson, G. A. AU - Ingalls, R. AU - Shechter, H. PY - 1970 UR - https://ntrs.nasa.gov/citations/19700064859 ID - 19700064859 ER -