@article {Ballard1989a,
	title = {{Die Entdeckung der Bismarck}},
	journal = {GEO},
	volume = {1989},
	number = {12},
	year = {1989},
	pages = {14{\textendash}36},
	issn = {0342-8311},
	author = {Ballard, R D}
}
