Modern school mathematics :
Dolciani, Mary P.
Modern school mathematics : algebra and trigonometry 2 / Mary P. Dolciani. - Boston : Houghton Mifflin, c1971. - 692 p. : ill.
Algebra.
Trigonometry.
QA152.2 / .D66
Modern school mathematics : algebra and trigonometry 2 / Mary P. Dolciani. - Boston : Houghton Mifflin, c1971. - 692 p. : ill.
Algebra.
Trigonometry.
QA152.2 / .D66