Kammala jumla mai zuwa: Gustaaf "Guus" Bierings (an haife shi a ranar 28 ga Satumba 1956) dan wasan tseren keke ne dan kasar Holland da ya yi ritaya wanda ya yi aiki tsakanin 1975 zuwa 1981. Ya kasance wani bangare na 'yan wasan Holland da suka lashe gasar
1978 UCI Road World Championships kuma ya gama a matsayi na 15 a Wasannin Olympics na 1980 a cikin gwajin lokaci. Ya kuma lashe mataki daya na Olympia's Tour a shekarar 1977.