@book {563,
	title = {Aquatic Invaders},
	year = {2007},
	author = {Schoenwald, J.}
}
@book {562,
	title = {Noxious Weeds of Australia},
	year = {1992},
	author = {Parsons, W. T. and Cuthbertson, E. G.}
}
@book {561,
	title = {Plant Invaders: The Threat to Natural Ecosystems},
	year = {1995},
	author = {Cronk, Q. C. B.}
}
@book {560,
	title = {Aquatic Plant Book},
	year = {1996},
	author = {Cook, C. D. K.}
}
