International Mathematical Olympiads 1978-1985 and forty supplementary problems - Klamkin, Murray S.; ProQuest (Firm) (Washington, DC : Mathematical Association of America, 1986)
Electronic reproduction. Ann Arbor, MI : ProQuest, 2015. Available via World Wide Web. Access may be limited to ProQuest affiliated libraries.
Keywords: Mathematics -- Problems, exercises, etc; Problem solving; Electronic books