Who´s who: edition European business and industry / edited by Th. Doelken. — 6ª ed. — [Munich] : who´s sho edition, 1994. — vii-2.882 p. ; 23 cm. — ( vol. 2: company profiles, company survey) ISBN 3-925306-14-5 (Vol. 2) 1. Empresas. I. Th. Doelken, ed.. 658(4)"1994"