Sastrillo, Bernalyn Hapin <br/><br/>Detective boys of masangkay:  ang closed-door mystery/ Bernalyn Hapin Sastrillo.  -- Quezon City:  Adarna House,  2018. <br/> col.: ill.;  23. <br/><br/><label>ISBN: </label>9789715087360 <br/><br/><label>Subjects--Topical Terms: </label><br/>Teenage boys.<br/>Burglary investigation.<br/>Offices.<br/><br/><label>Dewey Class. No.: </label>HS Fic Sa799 2018