@book{ig00394000, author = {Gregorius I, Pont. Max}, title = {Commentum super Cantica canticorum}, year = {not after 1473]}, note = {The true author is Robertus de Tumbalena (Bod-inc)}, publisher = {Ulrich Zel}, address = {[Cologne}, annote = { This record was exported from the Incunabula Short Title Catalogue (ISTC): http://data.cerl.org/istc/ig00394000} }