Elankumaran, C.
Ground water quality patterns of the Jaffna-Valikamam region: a statistical retr - Jaffna Department of economics 1994 - 69 p.
910.11 / ELA
Ground water quality patterns of the Jaffna-Valikamam region: a statistical retr - Jaffna Department of economics 1994 - 69 p.
910.11 / ELA