author = { Gregorovius, Ferdinand Morrison, Karl F. AND Gregorovius, Ferdinand },

title = { Rome and medieval culture selections from History of the city of Rome in the middle ages },

publisher = {Univ. of. Chicago Pr.},

isbn = {0226307492},

isbn = {0226307506},

year = {1971},

booktitle = {Phoenix books ; 427},

booktitle = {Classic European historians},

address = { Chicago [u.a.] },

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