@book{812,
	author = {Weil, Ray R. and Brady, Nyle C.},
	title = {The nature and properties of soils /},
	publisher = {Pearson,},
	year = {2017},
	address = {Harlow :},
	edition = {Fifteenth edition},
	url = {https://itmsp.museknowledge.com/UOH?qurl=https://libros-uoh.uoh.cl//ebook_2/the-nature-and-properties-of-soils/}
}