Caves and Speleology in Bulgaria.
Petŭr Beron, Trifon Daaliev, Alexey Jalov
This book summarizes our knowledge of the caves and cave research in Bulgaria. The first Bulgarian caving society was founded as early as 1929, but the first cave animals, fossils and archaeological artefacts in Bulgarian caves had been found and publishe
种类:
年:
2006
出版:
Kindle
出版社:
Independely Published
语言:
english
页:
507
ISBN 10:
1435631315
ISBN 13:
9781435631311
文件:
PDF, 37.33 MB
IPFS:
,
english, 2006