Books are the quietest and most constant of friends; they are the most accessible and wisest of counselors, and the most patient of teachers.

Charles W. Eliot

 
Đề thi Olympic Quốc Tế Lần 23 - Năm 1982

Thể loại: Toán
Language: English
Đề Thi
File format: PDF
File size: 44.3 k
No of Page: 1