@book{192877,
	author = {Courtenay, Walter R. and Williams, James D.},
	title = {Snakeheads (Pisces, Channidae)},
	publisher = {U.S. Dept. of the Interior, U.S. Geological Survey ; Denver, Colo.},
	year = {2004.},
	series = {U.S. Geological Survey circular},
	address = {Gainesville, FL}
}