BCSE Understanding mathematics :
Curriculum and Professional Support Division.
BCSE Understanding mathematics : Textbook for class ix / - Thimphu : CAPSD, 2007. - xvi, 360 p : ill. ; 28 cm.
99936-0-272-8
BCSE Understanding mathematics : Textbook for class ix / - Thimphu : CAPSD, 2007. - xvi, 360 p : ill. ; 28 cm.
99936-0-272-8