@book{329491,
	author = {MacCollum, David V.,},
	title = {Construction safety engineering principles :},
	publisher = {Mcgraw-Hill,},
	year = {2007.},
	address = {New York :},
	note = {Includes index.},
	url = {http://www.loc.gov/catdir/enhancements/fy0713/2007273290-t.html}
}