2. Harry Ransom Center, MS 3327, Container 191 Title: Papal bull Author: Gregory IX Place: Italy Date: 1234 July 13
3. Harry Ransom Center, MS 3327, Container 196 Title: Papal bull Author: Sixtus IV Place: Italy Date: 1474 February 7
4. Western Michigan University, WMU MS 112 Title: Papal bull Author: Sixtus IV Place: Rome Date: 1484.
5. Western Michigan University, WMU MS 118 Title: Papal bull Author: Alexander IV Place: Rome Date: 1257
6. Western Michigan University, WMU MS 175 Title: Papal bull Author: Clement V Place: France Date: between 1300-1350].