@book{41742,
	author = {Habermas, J�urgen, and Viertel, John.},
	title = {Theory and practice /},
	publisher = {Heinemann Educational Books,},
	year = {1974.},
	address = {London :},
	url = {http://www.gbv.de/dms/bowker/toc/9780435823856.pdf}
}