Selected problems and theorems in elementary mathematics Shklyarsky D.O., Chentsov N.N., Yaglom I.M.

Selected problems and theorems in elementary mathematics ARITHMETIC AND ALGEBRA
Shklyarsky D.O., Chentsov N.N., Yaglom I.M.
LINK WEBSITE ORIGINAL
http://en.bookfi.org/book/1220255
LINK ALTERNATIVO
https://www.mediafire.com/?z1l83z61d5zeu4y