Petrographic and Thermal Characterization of Mortar from a Church Ruin in Cagsawa, Albay, PhilippinesNina Muriel A. Laplana, Eric T. Miranda, John Carlo A. Mangay, Angel S. Recto and Jan-Michael C. CaymeMATEC Web Conf., 213 (2018) 02002DOI: https://doi.org/10.1051/matecconf/201821302002