Paleoecology of some Valanginian ammonoids: evidence from their abundance variations and isotopic data of the shells

by Reboulet, Stéphane, Ploch, Izabela, Rard, Anthony
Source: 1. Fossils-Darwin-Evolution 1. Banská Bystrica : Prírodovedecká fakulta Univerzity Mateja Bela, 2009 1. 9788080838072 1. S. 44-45