網址: https://d3i71xaburhd42.cloudfront.net/3dbd337f5032ae1eaf0b43eca4a5b13fe66ed07f/2-Figure1-1.png
網址2: https://www.semanticscholar.org/paper/Assessing-Groundwater-Potential-of-a-Limestone-in-Piamtang-Saenton/0d91e9718ec5278f82c10845c8977e31d398cca9/figure/0
