1. 18th. Communication of the series Orthovanadates and related compounds; 17th. Comm. : I. L. Botto, E. J. Baran and P. J. Aymonino, Monatsh. Chem., in the press.
2. �ber Diphosphate vom Typ Me(IV)P2O7
3. Effective ionic radii in oxides and fluorides