@book{234,
	author = {Ladha, J.K. (ed.) and Yadvinder-Singh},
	title = {Integrated Crop and Resource Managemnet in the Rice-Wheat System of South Asia},
	publisher = {Internatioanal Rice Reaserch Insitute},
	year = {2009},
	address = {IRRI,DAPO Box 7777, Metro Manila, philippiens}
}