Sirimanne, C.H.L.
Geology for water supply C.H.L.Sirimanne - Colombo Ceylon Association for the Advancement of Science 1952 - 30 p.
910.11 / SIR
Geology for water supply C.H.L.Sirimanne - Colombo Ceylon Association for the Advancement of Science 1952 - 30 p.
910.11 / SIR