@book{43645,
	author = {smith, Guy-harold,  Edited },
	title = {Conservation of natural resources /},
	publisher = {Wiley,},
	year = {1958 },
	address = {New York :},
	edition = {2nd ed.},
	url = {http://www.loc.gov/catdir/toc/fy0713/71129661.html}
}