@book{64140,
	author = {Butler, D. E},
	title = {The Electoral System In Britain 1918-1951 /},
	publisher = { The Clarendon Press,},
	year = {1953.},
	address = {Oxford  :},
	url = {https://fll.law.cu.edu.eg/fulltext/bks/B11-08389.pdf}
}