%0 Journal Article %A Yu. I. Manin %T Rational surfaces over perfect fields. II %J Sbornik. Mathematics %D 1967 %P 141-168 %V 1 %N 2 %U http://geodesic.mathdoc.fr/item/SM_1967_1_2_a0/ %G en %F SM_1967_1_2_a0