Behaviour of 'CA IND.2''FE IND.2''O IND.5' with 'NB' substitution and sintering temperatures seen by mossbauer spectroscopy - Duhalde, S; Saragovi, C; Moraes, I J; Terrile, Maria Cristina; Francisco, Regina Helena Porto (Latin-American Conference on the Application of the Mossbauer Effect, 1990)