Profile of Hoyer in 1993
Hazardous cargo bulletin ; 14 , 10 ; 67-68
1993
Aufsatz (Zeitschrift)
Unbekannt
British Library Online Contents | 1998
British Library Online Contents | 1992
Online Contents | 1995
British Library Online Contents | 1999
Hoyer expands Chinese presence
British Library Online Contents | 2004