EL-GAMAL, E. A., ABOU-ZAID, M. H., KHATER, M. R. (1993). 'EFFECT OF ETHREL TREATMENTS ON YIELD AND CHEMICAL COMPOSITION IN ROSELLE ( HIBISCUS SABDARIFFA . L. )', Egyptian Journal of Agricultural Research, 71(2), pp. 505-512. doi: 10.21608/ejar.1993.459046