1 | | Elementary Mathematics: Selected Topics and Problem Solving/ G. Dorofeev, M.Potapov, N. N. Rozov; Translated from the Russian by George Yankovsky . - Moscow: Mir, 1980. - 448p., 20cm Mã xếp giá: 510 D715Đăng ký cá biệt: Lầu 1 TV: 2000032569-70 |
2 | | Elementary School Mathematics. Book 1 / Robert E. Eicholz . - Lond.: Addson -Wesley, 1967. - 268p., 22cm Mã xếp giá: 372.7 E 34Đăng ký cá biệt: Lầu 1 TV: 2000032568 |