view references and hole table coordinate system

[Orion07]

I have somewhat of a large assembly created from an iges file (curved surfaces, non orthogonal planes). I created datum points in this assembly and now I want to create a hole table with the coordinates of certain datum points. A while back I created a "top" view using "Reorient... Orient by reference." Months later I created a view in a drawing using my previously defined "top" view but now I need to create a coordinate system where the X-Y plane must be coplanar to the screen in the drawing view to satisfy hole table criteria. The problem is I don't remember what references I used to create my "top" view. Is there a way to determine what references were used when defining a view?

Thanks.