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Continue to ChatVelammal Vidyalaya students measured the circumference of earth http://www.chennaisonline.com/velammal-vidyalaya-students-measured-the-circumference-of-earth/
Velammal Vidyalaya students measured the circumference of earth http://www.chennaisonline.com/velammal-vidyalaya-students-measured-the-circumference-of-earth/