Erratum: 125-tellurium and 77-selenium multinuclear magnetic resonance Studies of Te<sup>4</sup><inf>6</inf>+, Te<inf>4</inf>-<inf>n</inf>Se <sup>2</sup><inf>n</inf>+, Te<inf>2</inf>Se<sup>2</sup><inf>4</inf>+, and Te<inf>3</inf>Se<sup>2</sup><inf>3</inf>+ Polyatomic Cations (J.C.S. Chem. Comm. (1978), (957))