[mindcrime]

Some more, from 1989[1][2][3]. Which again, reference the missing "SHARD" paper, but contain enough detail to make it clear that the idea of SHARD existed, regardless of the status of that particular document.

[1]: https://apps.dtic.mil/sti/tr/pdf/ADA214478.pdf

[2]: https://apps.dtic.mil/sti/tr/pdf/ADA216523.pdf

[3]: https://apps.dtic.mil/sti/tr/pdf/ADA209437.pdf