MAHAPATRA, B.B., NANDA, J. and PRADHAN, S. 1995. ?POLYMETALLIC COMPLEXES Part XLIV. Complexes of Cobalt (II), Nickel (II), Copper (II), Zinc (II), Cadmium (II) and Mercury II with Doubly-Bidentate 0 N Z N 0 Donor Chelating Azo Dye Ligands, 4,4’-Bis (2’-Hydroxy-l’-Naphthyl-Azo)-Diphenyl and l,4-. Biological Sciences - PJSIR. 38, 9-10 (Oct. 1995), 337–340.