| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Umbria. Invito all'armonia | 978-88-86147-36-1 (88-86147-36-8) | 1998 | Giancarlo Gasponi |
| Umbria. Land of harmony | 978-88-86147-37-8 (88-86147-37-6) | 1998 | " |
Peter Langer · Peter Langgartner · Peter Langhorne · Peter Langhorst · Peter Langridge · Peter Langrock · Peter Lanzer · Peter Lemesurier · Peter Lenger · Peter Lingard · Peter Linser · Peter Longerich · Peter Longhurst · Pietro Lanzara Giancarlo Gasponi