@book{57410,
	author = {Sontag, Raymond James,},
	title = {European Diplomatic History, 1871-1932 /},
	publisher = {The Century co.,},
	year = {1933.},
	series = {The Century historical series},
	address = {London ;},
	url = {https://fll.law.cu.edu.eg/fulltext/bks/B11-06880.pdf}
}