@book{208673,
	author = {Sanders, Roger C.},
	title = {Clinical sonography},
	publisher = {Lippincott Williams & Wilkins},
	year = {c2007.},
	address = {Baltimore},
	edition = {4th ed.},
	url = {http://www.loc.gov/catdir/toc/ecip064/2005035265.html}
}