Steen, Darrick. Essentials of mathematics [electronic resource] / Darrick Steen. - 1st ed. - Delhi : Orange Apple, 2012. - 1 online resource (104 p.) : ill. ISBN: 9788132326472 (ebk.) 8132326474 (ebk.) Subjects--Topical Terms: Mathematics.Electronic books. Dewey Class. No.: 510