%0 Journal Article %A B. Rao %T Non-existence of certain Borel structures %J Fundamenta Mathematicae %D 1970 %P 241-242 %V 69 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/fm-69-3-241-242/ %R 10.4064/fm-69-3-241-242 %G fr %F 10_4064_fm_69_3_241_242