@book{19530,
	author = {Kaeber, Ernst},
	title = {Die Idee des europäischen Gleichgewichts :},
	publisher = {Verl. von Alexander Duncker,},
	year = {1907},
	address = {Berlin :},
	note = {Online-Ressourse, frei zugänglich},
	url = {https://archive.org/details/dieideedeseurop00kaebgoog}
}