@book{31683,
	author = {Heady, Harold F. and Child, R. Dennis},
	title = {Rangeland ecology and management /},
	publisher = {Westview Press,},
	year = {1994.},
	address = {Boulder :},
	note = {Rev. ed. of: Rangeland management. 1975.},
	url = {http://www.loc.gov/catdir/enhancements/fy0832/94002515-d.html}
}