%0 Journal Article %A A. Dey %A A. Das %T Optimal Variance- and Efficiency-Balanced Designs for One-and Two-Way Elimination of Heterogeneity. %J Metrika %D 1991 %P 227-238 %V 38 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/MET_1991__38_2_176350/ %F MET_1991__38_2_176350