%0 Journal Article %A Nirmala B. Limaye %T Cross-Ratios and Projectivities of a Line. %J Mathematische Zeitschrift %D 1972 %P 49-54 %V 129 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZ_1972__129_171817/ %F MZ_1972__129_171817