University of Queensland. Speleological Society & Sprent, J. K. (1970). Mount Etna caves: A collection of papers covering several aspects of the Mt Etna and Limestone Ridge caves area of central Queensland. University of Queensland Speleological Society.
Cita Chicago (17th ed.)University of Queensland. Speleological Society i J. K. Sprent. Mount Etna Caves: A Collection of Papers Covering Several Aspects of the Mt Etna and Limestone Ridge Caves Area of Central Queensland. St. Lucia, Qld.: University of Queensland Speleological Society, 1970.
Cita MLA (8th ed.)University of Queensland. Speleological Society i J. K. Sprent. Mount Etna Caves: A Collection of Papers Covering Several Aspects of the Mt Etna and Limestone Ridge Caves Area of Central Queensland. University of Queensland Speleological Society, 1970.