ISBN-13: 9783319143903 / Angielski / Twarda / 2015 / 479 str.
This book highlights some of the most difficult and persistent exploration ever undertaken in the United States - in Burnsville Cove, a small limestone valley in west-central Virginia - while at the same time reviewing the scientific discoveries made in the area's 116 km of caves in the course of 50 years. Overall, the book offers a unique combination of exploration and science by a conservation organization specifically dedicated to the preservation and study of the caves.