%0 Journal Article %A J.C. Koop %T On Upper Limits to the Difference in Bias Between Two Ratio Estimates. %J Metrika %D 1962 %P 145-149 %V 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/MET_1962__5_175147/ %F MET_1962__5_175147