"International Database Management" search on Google Books
Gus Giobbi on LinkedIn states that the IDBMA started Jan 1983
Reference from 1984 to the "International Database Management Association" on Appaloosa Road, San Diego, CA
ComputerWorld Magazine, 18 Feb 1985, "International Spectrum USA Computer Conference and Exhibition" March 20-22 New Orleans, LA
"International Database Management Association", 10675 Treena St, Suite 103, San Diego, CA