Philippine Engineering Journal  Volume XLVI number 2: December 2025 

 - 82 pages ;   28 cm 
<br/><br/> Librea, Jesha Faye T., Guanzon, Clarence R., Valencia, Paolo S., Camposano, Jomar Christian J., Caram, Rosabelle Louise A., Buquiz, Lowell P. (December 2025). Characterization of locally sourced perlite from Camarines Sur, Philippines. Philippine Engineering Journal, v. 46(2), pp.1-15. 
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<br/><br/><label>ISSN: </label>0117-5564 
<br/><br/><label>Dewey Class. No.: </label>PER 620 P5521 2025