Low depth mining in Estonian oil shale deposit

variant title
Abbau von Ölschiefer in Estland
statement of authorship
I.Valgma, T.Kattel
source
Kolloqium : Schacht, Strecke und Tunnel
location of publication
Freiberg
year of publication
pages
p. 213-223
language
inglise
Valgma, I., Kattel, T. Low depth mining in Estonian oil shale deposit // Kolloqium : Schacht, Strecke und Tunnel. Freiberg : TU Bergakademie Freiberg, 2005. p. 213-223.