00374nam a22001337a 4500003000400000005001700004008004100021020001100062040002500073100002800098245006200126260004100188300001100229OSt20260218155447.0260218b        |||||||| |||| 00| 0 eng d  a(pbk.)  cNVSU Library Bambang  a Batacan, Ma. Carmelita  aPlane Trigonometry: Text/ WorkbookcMa. Carmelita Batacan  aManila:bNational Book Store,c1980.  a265 p.