http://nokarino.com/gk-arabian-attacks-to-india-%e0%a4%85%e0%a4%b0%e0%a4%ac%e0%a5%8b%e0%a4%82-%e0%a4%95%e0%a4%be-%e0%a4%ad%e0%a4%be%e0%a4%b0%e0%a4%a4-%e0%a4%aa%e0%a4%b0-%e0%a4%86%e0%a4%95%e0%a5%8d%e0%a4%b0%e0%a4%ae/
http://nokarino.com/gk-vedic-period/