Language: English with French and German summary
This volume presents the results of the 2014 and 2015 international expeditions to Northern Laos and describes a total of 23 km of passages from 70 caves. Includes the Tham Houay Ngot-Pang Ngoy System (3620 m long) and Tham Lo (2103 m), both in Houaphan, as well as Tham Nam Lod (1796 m long) from Luang Prabang province.