@article{Bradley2008,
	title = {Human-powered Search Engines: An Overview and Roundup},
	author = {Phil Bradley},
	journal = {Ariadne },
	url = {http://www.ariadne.ac.uk/issue54/search-engines/},
	volume = {54},
	year = {2008},
	biburl = {http://www.bibsonomy.org/bibtex/2f147ea9f706276c25cb5c0c4d25ff96a/griesbau},
	keywords = {Engines Human-powered Search Suchmaschinen Webkataloge Webverzeichnisse }
}