@book{37791,
	author = {Heise, David R.},
	title = {Causal analysis /},
	publisher = {Wiley,},
	year = {[1975]},
	address = {New York :},
	note = {"A Wiley-Interscience publication."},
	url = {http://swbplus.bsz-bw.de/bsz008630550inh.htm}
}