1 | Rising groundwater levels in the chalk-basal sands aquifer of the Central London basin : April 2000 |
2 | Rising groundwater levels in the chalk-basal sands aquifer of the Central London Basin. Progress report, March 1996 |
3 | Rising groundwater levels in the chalk-basal sands aquifer of the Central London Basin. Progress report, March 1995 |
4 | State of the environment report for London 2001 |
5 | State of the environment report for Thames Region : first update 2001 |