author = { Westrop, Stephen R. AND Ludvigsen, Rolf },

title = { Biogeographic Control of Trilobite Mass Extinction at an Upper Cambrian "Biomere" Boundary },

publisher = {Paleontological Society},

isbn = {0094-8373},

isbn = {1938-5331},

year = {1987},

url = { http://slubdd.de/katalog?TN_libero_mab2 }