Iam a math teacher and wud like to lay my hands on the foll books 1) Algebra class 8/9 by Dorofeev. 2) Algebra and elementary calculus by A. Kolmogorov. 3) Algebra and elementary calculus part 1 n 2 by Dorofeev. 3) Geometry grades 7 to 9 by Atanasyan, L.S. How can i obtain the above books.. Pls help