@inbook{240,
  author = {Norman MacLeod and Keller Gerta},
  title = {Environmental changes across the  Cretaceous-Tertiary boundary in northeastern Brazil},
  year = {1996},
  journal = {In, MacLeod, N. and Keller,  G., (eds.), The Cretaceous-Tertiary Mass Extinction: Biotic and Environmental  Effects},
  pages = {451-470},
  publisher = {Norton Press},
  address = {New York},
  language = {eng},
}