De Silva, T.K.N.P. Mendis, D.L.O. Wickramanayake, V.E.A. Uragoda, C.G.

Scientific Principles seen in ancient artefacts and monumental structures - NARESA Colombo 1995 - 54 lk - Soil Erosion Ancient ruins Water Conservation Scientific Principles Health Principles Sri Lanka - Science Education Series No.36 .

http://thakshana.nsf.ac.lk/slstic/NA-129/NA_129.pdf = Scientific Principles seen in ancient artefacts and monumental structures

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