@book{78547,
	author = {Gollin, Douglas. and Skovmand, Bent.},
	title = {Optimal search in Ex situ collections of wheat genetic resources},
	publisher = {Centro Internacional de Mejoramiento de Maíz y Trigo,},
	year = {1998.},
	series = {Economics. Working paper},
	address = {México, D.F. :}
}