Tunnelling in rocks
Ponrajaha, A.J.P.
Tunnelling in rocks - Engineering Geology Division, Department of Irrigation Colombo 07 1999 - 100 p. Fig., Table, Chart
6868
Engineering
624.19 / PON
Tunnelling in rocks - Engineering Geology Division, Department of Irrigation Colombo 07 1999 - 100 p. Fig., Table, Chart
6868
Engineering
624.19 / PON