http://www.artesdelasfilipinas.com/archives/50/the-manunggul-jar-as-a-vessel-of-history
The Manunggul jar was one of the numerous jars found in a cave believed to be a burial site (Manunggul, was part of the archaeologically significant Tabon Cave Complex in Lipuun Point, Quezon, Palawan) that was discovered on March 1964 by Victor Decalan, Hans Kasten and other volunteer ... Salazar, Zeus A. "Ang Kamalayan at Kaluluwa: Isang Paglilinaw ng Ilang Konsepto sa Kinagisnang Sikolohiya" in Rogelia Pe-Pua, ed., Sikolohiyang Pilipino: Teorya, Metodo at Gamit.