Das Speleonics Magazin der National Speleological Society ist unter http://www.caves.org/section/commelect/drupal/speleonics komplett online abrufbar. Aus der Beschreibung: Speleonics ® is the official publication of the Communications & Electronics Section. Primary interests include cave radio, underground communication and instrumentation, cave-rescue communications, cave lighting, and cave-related applications of amateur radio. Future directions may include subjects on computerized geophysics, such as micro-gravity and magnetic surveys in search of... [mehr]