Sweet AR. Reflections on the Cretaceous-Tertiary Boundary Plant Record According to W.A.S. Sarjeant: Comment on Dinosaur Extinction, Sudden or Slow, Cataclysmic or Climatic?. GS [Internet]. 1997 Dec. 12 [cited 2024 Dec. 25];24(4). Available from: https://journals.lib.unb.ca/index.php/GC/article/view/3957