1. Union Carbide Corp., U.S. Pat. 3 053 629 (1962) (Chem. Abstr., 1963, 58, 273).
2. Union Carbide Corp., U.S. Pat. 3 067 011 (1962) (Chem. Abstr., 1963, 58, 7639).
3. SYNTHESIS OF VANADIUM HEXACARBONYL
4. Ethyl Corp., Br. Pat. 892 142 (1962) (Chem. Abstr., 1963, 58, 8682).