@book{132906,
	author = {Popper, Karl R. and Bartley, William Warren,},
	title = {Realism and the aim of science /},
	publisher = {Routledge,},
	year = {1993.},
	address = {London :},
	url = {http://www.loc.gov/catdir/enhancements/fy0648/91045665-d.html}
}