A selection of the contents. Studies on the polymerization of propylene using highly active magnesium chloride supported Ziegler-Natta Catalysts: Effects of alkyl concentration on the polymerization rate and on the active centre concentration (P.J.T. Tait, I.A. Jaber and A.J. Loontjens). Ethylene polymerization in gas-phase and slurry reactors (M.O. Jejelowo, N. Bu, D.T. Lynch and S.E. Wanke). Kinetic profile of polymerizatin with Cr-oxide/SiO2 catalyst (A. Follestad, S. Helleborg and V. Almquist). Effects of the structure of external alkoxy silane donor in high activity Ziegler-Natta Catalyst on the microstructure of polypropylene (M. Härkönen, J.V. Seppälä and T. Väänänen). 13C NMR investigation on Lewis base activation effect in high yield supported Ziegler-Natta Catalysts (M.C. Sacchi, I. Tritto, C. Shan and L. Noristi). Co- and terpolymerization of ethene and higher &agr;-olefins with MgH2 supported Ziegler catalysts: New mechanistic insight via the true reactivity ratios (G. Fink, W. Fenzl, N. Herfert, T. Müller and I. Jaber). Co- and terpolymerization of ethylene, propylene and butadiene with supported titanium catalyst (S. Lin, Q. Wu and L. Sun). Syntheses of terminally hydroxylated polyolefins using Zn(C2H5)2 and oxygen as chain transfer and quenching reagents (T. Shiono, K. Yoshida and K. Soga). Homo- and co-polymerization of ethylene with the highly active TiCl4/THF/MgCl2 catalyst (I. Kim, M.C. Chung, H.K. Choi, J.H. Kim and S.I. Woo). Hafnium based catalysts for the polymerization of olefins (F. Masi, S. Malquori, L. Barazzoni, F. Menconi, C. Ferrero, A. Moalli and R. Invernizzi). High active Ziegler-Natta Catalysts for homo- and copolymerization of ethylene by supporting a Grignard compound and TiCl4 on SiO2 (A Muñoz-Escalona, A. Fuentes. J. Liscano and A. Albornoz). New solvay SB 12 TiCl3 polypropylene catalyst (A. Bernard and P. Fiasse). Syndiotactic propylene polymerization with iPr[CpFlu]ZrCl2 (J.A. Ewen, M.J. Elder, R.L. Jones, S. Curtis and H.N. Cheng). Propylene polymerization by stereorigid metallocene catalysts: Some new aspects of the metallocene structure/polypropylene microstructure correlation (M. Antberg, V. Dolle, R. Klein, J. Rohrmann, W. Spaleck and A. Winter). Polymerization of styrene and copolymerization of styrene with olefin in the presence of soluble Ziegler-Natta Catalysts (M. Kakugo, T. Miyatake and K. Miaunuma).