@book{is00566450, author = {Sixtus IV, Pont. Max. (formerly Franciscus, Cardinalis de Rovere)}, title = {Indulgentia 1481, for Überlingen. For promoting the war against the Turks}, year = {about 1481]}, note = {Printed on the same sheet as GW 26, 27 and 29}, publisher = {Johann Otmar}, address = {[Reutlingen}, annote = { This record was exported from the Incunabula Short Title Catalogue (ISTC): http://data.cerl.org/istc/is00566450} }