It looks like the original is from an image where the dyes have started to break down, so it is a bit more than just a colour balance issue. Unfortunately, I can't get down to my regular computer right now, so I am working off a very inexpensive netbook that does not have a calibrated screen
The first thing that I did was to get some of the red and yellow out to compensate for the deterioration of the blues and cyans. The exposure is off a bit, so I went in and adjusted the levels to bring out the full range of colours and finally I upped the saturation a bit to take out the flatness of the image a bit. The usual dust from the scanner needs to be cleaned up and I might be tempted to play with the curves a tiny bit to crisp up the contrast too.
