PRACE DOKTORSKIE - SZWECJA 548,687 KROON PER-OLF Bicycle accidents in Gothenburg 1983-84 : [akademisk avhandlingj / Per-Olof Kroon ; Gothenburg University, from the Department of Orthopaedics. - Goteborg : [Universitas Regia Goghoburgensis], 1990. - 90 s. : wykr. ; 24 cm ISBN 91-790-933-6