Filling gaps

I've finally finished harvesting gravities from the Barclay Perkins logs I have photographed. What next? Pretty obvious, really. Time to fill in some of the gaps.

"Which gaps might those be?" The two decades of the 20th century so far unrepresented in my Mega-Gravity Table. The 1980's and 1990's. I've started on with the oldest Good Beer Guide I own, 1983. My guess is that it only contains around 500 beers. With any luck that shouldn't take more than a week.

This seems a good point to renew my call for volunteers. "What do you want us to volunteer for?" Transcribing the gravities and ABV's from part of an old Good Beer Guide. I don't even expect you to do a whole one. Just a couple of letters. Every little helps. This is an example spreadsheet

I've just thought of something else for which I need help. Colours. I have beer colours in a few different formats. Many are in lovibond, but a 1 inch column rather than the 0.5 inch column used today. Anyone any idea how I can convert these figures to EBC? Whitbread uses another variation of 1 inch lovibond, with numbers for brown and red. Help converting these would be handy, too.