Contribution to the chalk classification by means of visual and penetration technique : Perelberg, S; Guy, D G; Fernando, D A Proc Conference on Penetration Testing in the UK, Birmingham, 6–8 July 1988P61–65. Publ London: Thomas Telford, 1989

Zdroj: In International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts 1990 27(5):276-276
Databáze: ScienceDirect