The wikipedia entry for this confirms two sources depending on context, and in your case it came from a late 80s paper:
Sarin, DeWitt & Rosenberg, Overview of SHARD: A System for Highly Available Replicated Data, Technical Report CCA-88-01, Computer Corporation of America, May 1988
Sarin, DeWitt & Rosenberg, Overview of SHARD: A System for Highly Available Replicated Data, Technical Report CCA-88-01, Computer Corporation of America, May 1988
https://en.wikipedia.org/wiki/Shard_(database_architecture)#...