The contribution of genetic resources and diversity to wheat productivity a case from the Punjab of Pakistan Hartell, Jason. creator text mx México, D.F Centro Internacional de Mejoramiento de Maíz y Trigo 1997 1997 monographic eng 35 p. ; gráfs. ; tablas /by Jason Hartell [and others] Recursos genéticos Trigo Pakistán Trigo Rendimiento Trigo Variedades </titleInfo> <name type="corporate"> <namePart>CIMMYT</namePart> <namePart/> </name> </relatedItem> <relatedItem type="series"> <titleInfo> <title>Economics. Working paper ; 97-01 78543 990601 20220329142116.0