Other links:
https://boatlutesofthephilippines.weebly.com/
The homepage of ethnomusicologist Hans Brandeis and Arjho Carino-Turner with many pictures and videos of boatlutes

https://archive.org/details/waueum_1966004-Garfias_Philippine-Films
Archive page for the video recordings of researcher Robert Garfias  

https://upethno.upd.edu.ph//
The Homepage of the United Philippines Center for Musicology  

https://phbmi.com/
Wonderful Homepage about artists, instruments and festivals with Bamboo instruments in the Philippines

http://www.socsci.uci.edu/~rgarfias/aris/philippines-field-recordings/sftpaa.org/
Robert Garfias huge pages of field recordings in the Philippines, highly recommended!

http://www.kipas.nl/MainMenu.html
The gallery and informational pages of  Fekke de Jager

http://litera1no4.tripod.com/tboli_frame.html
A huge article about the T'boli by  Faye Velasco