@book{71022,
	author = {Powis, David.},
	title = { The signs of crime :},
	publisher = {New York : McGraw-Hill Book Co. (UK), },
	year = {1977.},
	address = {London ;},
	url = {https://fll.law.cu.edu.eg/fulltext/bks/B10-08918.pdf}
}