The USSR Olympiad Problem Book: Selected Problems and Theorems of Elementary MathematicsEbookThe USSR Olympiad Problem Book: Selected Problems and Theorems of Elementary MathematicsbyD. O. ShklarskyRating: 4 out of 5 stars4/5Save The USSR Olympiad Problem Book: Selected Problems and Theorems of Elementary Mathematics for later
Dover Books on MathematicsEbook seriesDover Books on MathematicsbyRobert GilmoreSave Dover Books on Mathematics for later