@book{119887,
	author = {Ricketts, Tom.},
	title = {The Cambridge companion to Frege /},
	publisher = {Cambridge University Press,},
	year = {2010.},
	series = {Cambridge companions to philosophy},
	address = {Cambridge ;},
	url = {http://catdir.loc.gov/catdir/enhancements/fy1007/2010011242-b.html}
}