Dyke, G. V. Comparative experiments with field crops - 2 ed. - London : Charles Griffin, 1988 - 262 p. : ilus. ; gráfs. 40-136 LCCN: 1138 Subjects--Topical Terms: Agricultura--Estadisticas.Agricultura--Experimentación. Dewey Class. No.: 630.72 / D9 1988