author = { Pfann, Paul },

title = { Übungsblätter zur Perspektive },

keywords = { Plan , Architekturzeichnung , Sonstiges },

year = {unknown},

url = { https://katalog.arthistoricum.net/id/67-b2FpOmRldXRzY2hlZm90b3RoZWsuZGU6YTg0NTA6Om9ianw3MTQ2NzkwN3xtX2RpZ2l0YW1fMDk5MDAzMw }