The present volume of Bibliographie Linguistique I Linguistic Bibliography is the fifty-second to have been published to date. An important innovation is the revised and much expanded classification of the languages of South America. BLonline, the internet version of BL, was officially presented on 21 March 2003 at a symposium in the Koninklijke Bibliotheek, the National Library of the Netherlands, and subsequently at the XVIIth International Congress of Linguists, which was held in Prague, from 24 through 29 July 2003. BLonline now offers over 150,000 titels and is available at . The publication of this volume marks a special event in the history of BL. Dr. Zdenek Tyl and Dr. Milena Tylova (prague) have ended their faithful collaboration after having served as correspondents for the Czech Republic (formerly Czechoslovakia) since 1963. We are very pleased to report that the Ustav pro jazyk cesky, the Institute for the Czech Language, will take over their task. The present volume is also the last to have profited from the expert collaboration of Dr. Rolf Kodderitzsch (Bonn) who has been our correspondent for Celtic linguistics for thirteen years. We kindly thank Dr. Tyl, Dr. Tylova and Dr. Kodderitzsch for their much appreciated efforts. We also gratefully acknowledge the continued contributions from Prof. Dr. Winfried Boeder (Oldenburg) and from the Linguistic State University of Minsk in the fields of Caucasian and Belorussian linguistics.