Land subsidence : proceedings of the Tokyo symposium, September 1969.
- Unesco : Paris iash / aihs, 1970.
- Vols. : ill. ; 25 cm.
93 93
Groundwater.
Mines and mineral resources --Congresses
333.72 / U3l
93 93
Groundwater.
Mines and mineral resources --Congresses
333.72 / U3l