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  1. 1

    වැසි ජල කළමනාකරණය
    Vesi jala kalamanakaranaya
    by පියදාස, රන්ජන යූ. කේ

    Published 2017
    Book
  2. 2

    A design manual for rooftop rain water harvesting systems Sri Lanka

    Published 2021
    Book