@book{j:zpf,
	title = {Human Behavior and the Principle of Least Effort},
	address = {Cambridge, MA},
	author = {George Zipf},
	publisher = {Addison--Wesley},
	year = {1949},
	biburl = {http://www.bibsonomy.org/bibtex/211e5003ce73ea041fcdb50f7e0fbf82d/nlp},
	keywords = {2000 book nlp }
}