@book{326,
	author = {Gill, Norman Thorpe and Barnard, D. J.},
	title = {Agricultural botany /},
	publisher = {Duckworth, },
	year = {1980},
	address = {London :},
	edition = {3rd ed.},
	url = {https://www.cicy.mx/sitios/sib/doctoelectronico/330.pdf}
}