author = { Conarroe, Carolyn },

title = { Coal mining in Colorado's northern field },

edition = { 1. ed. } ,

publisher = {Conarroe},

isbn = {0971107319},

keywords = { Staat Colorado , Kohlenbergbau , Geschichte },

year = {2001},

address = { [Erie, Colo.] },

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