Engineering rock mass classifications :
Bieniawski, Z. T.
Engineering rock mass classifications : a complete manual for engineering and geologists in mining, civil, and petroleum engineering / Z. T. Bieniawski. - USA : John Wiley & Sons, c1989. - xii, 251 p. : ill. ; 23 cm.
Includes bibliography and index.
0471601721
Engineering.
624.15132
Engineering rock mass classifications : a complete manual for engineering and geologists in mining, civil, and petroleum engineering / Z. T. Bieniawski. - USA : John Wiley & Sons, c1989. - xii, 251 p. : ill. ; 23 cm.
Includes bibliography and index.
0471601721
Engineering.
624.15132