Givetian true 133 Givétien d5 Givetien Monde GIVE Givetian Givetien Bultynck et al., 1991. Mém. Serv. Géol. Belgique n°30; Dejonghe al. 2006 Geologica Belgica vol.9 1-2 225 false 241 8 1085 2020-11-20T15:41:00.425Z Givetien h.bressan@brgm.fr Hélène Bressan 2019-03-25T13:23:22.976Z Givetian 2019-03-25T13:21:08.381Z 2022-12-08T06:53:53.944Z