author = { Frank, Tracy D. AND Lyons, Timothy W. AND Lohmann, Kyger C. },

title = { Isotopic evidence for the paleoenvironmental evolution of the Mesoproterozoic Helena Formation, Belt Supergroup, Montana, USA },

publisher = {Elsevier BV},

isbn = {0016-7037},

year = {1997},

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