Metabolism and enzymology of nucleic acids : proceedings of the fourth international symposium on metabolism and enzymology of nucleic acids organized by the Institute of molecular biology, Slovak Academy of Sciences, Bratislava, Czechoslovakia : held at Smolenice Castle, March 18-22, 1984 / 5 - Zelinka, Ján, 1922-; Balan, Jozef (Slovak Academy of Sciences, 1984)