@book{18983,
	author = {Ackerman, Raymond, and Prichard, Denise.},
	title = {Hearing grasshoppers jump},
	publisher = {D. Philip,},
	year = {2001.},
	address = {Cape Town :},
	note = {Includes index.},
	url = {http://books.google.com/books?id=dNORAAAAIAAJ}
}