Media type: E-Article Title: Seasonal variation in boreal Early Cretaceous calcareous nannofossils Contributor: Thomsen, Erik imprint: Elsevier BV, 1989 Published in: Marine Micropaleontology Language: English DOI: 10.1016/0377-8398(89)90008-x ISSN: 0377-8398 Keywords: Paleontology ; Oceanography Origination: Footnote: