@book{17385,
	author = {Oracle Publications},
	title = {বিসিএস প্রিলিমিনারি ভূগোল (বাংলাদেশ ও বিশ্ব) [BCS preliminary Geography (Bangladesh and International)] :},
	publisher = {Oracle Publications,},
	year = {2019.},
	address = {Dhaka :}
}