Symposium Secretariat, Chantal Iannarelli,
Congre`s Scientifiques Services,
2 Rue des Villarmains,
F-92210 Saint-Cloud, France.
Tel: +33 (1) 47 71 90 04. Fax: +33 (1) 47 71 90 05
> Published in Macromol. Symp.132, 1-462 (1998)