%V 3 %D 1990 %O This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. %P 127-136 %T The occurrence of calcareous nannofossils in the Triassic/Jurassic boundary interval %A P Bown %A AR Lord %J Les Cahiers de l'Université Catholique de Lyon %L discovery10204117