@inproceedings {4106,
	title = {Experiments With ClueWeb09: Relevance Feedback and Web Tracks},
	booktitle = {Text Retrieval Conference (TREC)},
	year = {2009},
	url = {http://trec.nist.gov/pubs/trec18/papers/uwaterloo-cormack.RF.WEB.pdf},
	author = {Mark Smucker and Charles Clarke and Gordon Cormack}
}
