Balch, Edwin Swift. Ice Caves and the Causes of Subterranean Ice: Allen, Lane & Scott, Philadelphia, November, 1896, and The Journal of the Franklin Institute, Philadelphia, March, 1897, vol. CXLIII., pages 161-178. Ice Cave Hunting in Central Europe: Appalachia, Boston, 1897, vol. VIII., pages 203-209. Subterranean Ice Deposits in America: Journal of the Franklin Institute, Philadelphia, April, 1899, vol. CXLVII., pages 286-297.

Baltzer, Dr. A. Eine Neue Eishöhle im Berner Oberland: Jahrbuch des Schweizer Alpen Club, Bern, 1892-1893, pages 358-362.

Behrens, Dr. Georg Henning. Hercynia Curiosa, Nordhausen, 1703.

Bel, Matthias. Philosophical Transactions, London, 1739, vol. XLI., page 41 et seq.

Benedict, Aiden S. Decorah Republican, June 19th, 1881.

Berthoud, Edward L. American Journal of Science and Arts, Third Series, 1876, vol. XI., page 108.

Bielz, E. Albert. Siebenbürgen, Handbuch, Carl Graeser, Wien, 1885.

Billerez, Mons. de. Histoire de l’Académie Royale des Sciences, 1712, page 22 et seq.

Bonney, T. G. The Alpine Regions, 1868. Nature, vol. XI., pages 310, 327, 328.

Boué, Dr. Ami. La Turquie d’Europe, Paris, 1840, vol. I., page 132. Sitzungsbericht der K. K. Akademie der Wissenschaften in Wien, 1864, I. Theil, page 321 et seq.