@book{29515,
	author = {Ahmad, N.},
	title = {Vertisols and technologies for their management /},
	publisher = {Elsevier,},
	year = {c1996.},
	series = {Developments in soil science ;},
	address = {Amsterdam ;},
	url = {http://www.loc.gov/catdir/enhancements/fy0602/97128936-d.html}
}