... speleologists of a wide range of nationalities to develop and coordinate international speleology in all of its scientific, technical, cultural, and ...
UIS History Video, 1965-2015 ... This video by Boris Watz was created to document and celebrate the 50th Anniversary of the UIS in 2015. Boris added more ...
International Union of Speleology-International Union of Speleology
Speleology artificial cave dark tunnel excavation underground. Old adit for the extraction of metal and rocks. Duration: 00:00:09.776. Frame Rate: 29.97 fps.