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Solar System Exploration - NASA
http://solarsystem.nasa.gov/index.cfm
Solar System Exploration - NASA
Abdelrahman El-Leathy
Professor
Mechanical Engineering Deptartment
كلية الهندسة
Building 3, Room 2C 45, Mechanical Engineering Department, College of Engineering, King Saud University, PO Box 800, Riyadh 11421, Saudi Arabia