OrdoƱez, Merlie N. Development and validation of worktext in applied mathematics - Morong, Rizal [publisher not identified] 2011 - 112 leaves ; 28 cm. Thesis (M.A.T.) - University of Rizal System. Subjects--Topical Terms: Teaching -- Aids and devices.Mathematics -- Study and teaching.Dewey Class. No.: 371.33 / Or2d