@book {12584,
	title = {Die Biber an der mittleren Elbe. Nebst einem Anhange {\"u}ber Platypsyllus castoris Ritsema},
	year = {1894},
	pages = {vi + 47 p.},
	publisher = {Dessau: Paul Baumann},
	organization = {Dessau: Paul Baumann},
	author = {Friedrich, H.}
}
