@book{ 0-1621029816, title = {Caves of fire: inside America's lava tubes}, author = {Bunnell, Dave}, address = {Huntsville, AL}, publisher = {National Speleological Society}, year = {2008}, isbn = {9781879961319}, language = {English}, url = {https://katalog.ub.tu-freiberg.de/Record/0-1621029816} }