@article {2950,
	title = {Spongiologische Untersuchungen am Ochridasee.},
	journal = {Archiv f{\"u}r Hydrobiologie},
	volume = {34},
	year = {1938},
	pages = {48-80.},
	keywords = {Porifera},
	author = {Arndt, W.}
}
@article {2409,
	title = {Spongiologische Untersuchungen am Ochridasee.},
	journal = {Archiv f{\"u}r HydrobiologieArchiv f{\"u}r Hydrobiologie},
	volume = {34},
	year = {1938},
	pages = { 48-80},
	keywords = {Porifera},
	author = {Ardnt , W.}
}
@article {33,
	title = {Spongiologische Untersuchungen am Ochridasee.},
	journal = {Archiv f{\"u}r Hydrobiologie},
	volume = {34},
	year = {1938},
	pages = { 48-80},
	keywords = {Porifera},
	author = {Ardnt , W.}
}
