@book{9171,
	author = {Alonzo, Merylle Angeli T., et al. },
	title = {A Study on the performance of concrete using the packing density test in proportioning the natural and crushedcourse aggregates},
	year = {2011},
	note = {Thesis (B.S. Civil Eng) -- Mariano Marcos State University-College of Engineering, Batac City }
}