[4]
Consideration of the geomechanicsclassification of Bieniawski.In: Proc. Int. Symp. Eng. Geol.Underground Constr. LNEC. Lisbon:[s. Serafin J L, Pereira J P. n . 1983
[4]
Consideration of the geomechanicsclassification of Bieniawski.In: Proc. Int. Symp. Eng. Geol.Underground Constr. LNEC. Lisbon:[s. Serafin J L, Pereira J P. n . 1983