@book{169646,
	author = {Banowetz, Gary M.},
	title = {Mineral content of grasses grown for seed in low rainfall areas of the Pacific northwest and analysis os ash from gasification of bluegrass (Poa pratensis L.) straw},
	year = {ene. 2009},
	url = {http://pubs.acs.org/doi/full/10.1021/ef800490w}
}