00689nam a22001937a 4500 OSt 20230529112630.0 220905b |||||||| |||| 00| 0 eng d HSLRC HSLRC HSLRC TK 6564 M198 2012 Magno, Jazzel B. 22494 Usage of cellphone affects the academic performance of selected fourth year high school in Our Lady of Perpetual Succor College Marikina City 33 pages, illustrations, 28 cm. Research SHS Thesis 31682 Paul Bryan O. Maniling 31683 lcc THE 84408 84408 0 0 lcc 0 0 HSLRC HSLRC THE 2022-09-05 TK 6564 M198 2012 THE0019HS 2022-09-05 00:00:00 1 2022-09-05 THE Jen