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"Rules of the SPDX RTTY Contest 2022
Sponsored by PZK,PKRVG
Rules of the SPDX RTTY Contest 2022
The SPDX RTTY Contest organized the Polish Radiovideography Club ( PK RVG )"
https://pkrvg.org/strona,spdxrttyen.html
SP DX CONTEST 2021 – RULES
"ORGANIZERS: PZK - Polish Amateur Radio Union (Polski Związek Krótkofalowców) in cooperation with the SP DX Club. "
https://spdxcontest.pzk.org.pl/2021/rules.php