@book{1223,
	author = {Chowdhury, Fatema and Chowdhury, Munibur Rahman},
	title = {Essentials of number theory  /},
	publisher = {Pi,},
	year = {c2005.},
	address = {Dhaka:},
	edition = {1st ed.},
	note = {Includes bibliography (p. 222) and index.}
}