| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| The Head Hunters Of Northern Luzon From Ifugao To Kalinga | 978-1-4142-4231-6 (1-4142-4231-X) | 2005 | Cornelis De Witt Willcox |
| The Head Hunters of Northern Luzon: From Ifugao to Kalinga A Ride Through the Mountain | 978-1-4264-6547-5 (1-4264-6547-5) | 2007 | |
C.D. · C. W. · Cornelis DeWitt Willcox · D.W. · W.W.