It's also interesting to note what they left out of the Aid/Insight books. In particular they left out many of the speculative interpretations of Daniel and Revelation and the type/anti-type interpretations. A tacit admission even then, that most of this stuff would likely be scrapped at some point, so was better left out of their version of a Bible Encyclopedia if it was to have any longevity.
Come to think on it, and without checking, I don't think there are entries for "this generation" or the UN as the "scarlet-coloured beast" either. They probably knew they'd have to revise the first, and didn't want to promote the latter in such a formal statement of doctrine.
Also absent is any discussion of disfellowshipping or congregation discipline, which they claim is completely Bible based. If it's Bible based then why not discussed using Bible terms in a Bible dictionary?
I should have checked before making these points but I think they're correct.