DOI
http://dx.doi.org/10.5038/1827-806X.2.1.22
Recommended Citation
Georgiev, V..
1966.
Achievements of Bulgarian pot-holers.
International Journal of Speleology,
2: 170.
Available at:
https://digitalcommons.usf.edu/ijs/vol2/iss1/23
COinS
