Title:Cultural conditions required for the induction of an adaptive acid-tolerance response (ATR) in Sinorhizobium meliloti and the question as to whether or not the ATR helps rhizobia improve their symbiosis with alfalfa at low pH
Title:Impacto laboral de Wal-Mart en la productividad laboral. Un análisis por municipio en México / Labor impact of Wal-Mart on labor productivity: an analysis by municipality in Mexico