Another source for RDA numbers?

Jim Simon

I have a  number of QSLs, mostly from the early 1990's, that have no RDA number on the QSL, and RDAsearch on has no info on those callsigns. For example -- UZ1OWA (1992) and UZ9XWH (1992). Any suggestions on where else to look for the RDA info?

Jim  W1YY

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