@Article{ authors = " Tomas U. Ganiron, Nieves Ucol-Ganiron, Tommy U. Ganiron III", title = "Recycling of Waste Coconut Shells as Substitute for Aggregates in Mix Proportioning of Concrete Hollow Blocks ", journal = "World Scientific News", issue = "2017 / Tom 77 / Numer 2", pages = "107 - 123" }