@book{23754,
	author = {Leishman, J. Gordon.},
	title = {Principles of helicopter aerodynamics /},
	publisher = {Cambridge University Press,},
	year = {2006.},
	address = {Cambridge ;},
	edition = {2nd ed.},
	url = {http://www.loc.gov/catdir/toc/ecip0518/2005025467.html}
}