The Studio Year Planners
I recently found these three year planners from Cargo for years 1981, 1982 & 1983. I had hi res transfers done so you can zoom in to see the names of the bands, 16 track or 8 track, day or night session, Day sessions were at the top of each day, the night session underneath eg 18th Jan 1982 Flying Glass were in during the day followed by the Sofas at night. Fascinating reading. It's just a shame I've never found any of the planners from the earlier years.
Because the planners are so big it's not easy to read individual days so I've introduced a magnifier. To magnify sections just pass your curser over the planner.