[IanCal]

The first conference proceedings were published in 1976 which might be where this is coming from.

https://www.abebooks.com/first-edition/First-West-Coast-Comp...

[kristianp]

The image of the cover says 1977, I'd say the date is an error.

[IanCal]

That’s the date of the conference. The proceedings appear to have been published the year before.

[BirAdam]

It is, indeed, an error. I will correct the record.