Preheat oven to 350°.
Beat eggs and egg whites at medium speed of a mixer until well-blended. Gradually add juice, rind, and milk to egg mixture, beating until well-blended. Spoon mixture into crust, and bake at 350° for 20 minutes or until almost set (the center will not be firm but will set up as it chills). Cool pie on a wire rack. Cover loosely, and chill 4 hours. Spread whipped topping evenly over filling.