Preliminary Proposal for the Project >>Heaven´s Cave<< (Vietnam) Adaptment for Tourist Purpose

by Debevc, Bogdan, Knez, Martin, Kranjc, Andrej, Prelovšek, Mitja, Semeja, Aleš, Slabe, Tadej
Source: 1. 6th congress International show caves association : proceedings 1. Liptovský Mikuláš : State Nature Conservancy of the Slovak Republic, Slovak Caves Administration, 2011 1. S. 47-51 1. 9788089310593