@inbook {3220,
	title = {Ciliata libera et ectocommensalia.},
	booktitle = {Die Tierwelt der Nord- und Ostsee},
	volume = {Lief. 23 (},
	year = {1933},
	note = { General, Diags.},
	pages = {29-146},
	address = {Leipzig},
	keywords = {Podophrya fixa},
	author = {Kahl, A.},
	editor = {Grimpe, G. and Wagler, E.}
}
