Beginner Amateur Radio Prediction Problem Collection 2021 Edition

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Beginner Amateur Radio Prediction Problem Collection 2022 Edition – Seibundo Direct Sales Store (seibundo-store.com)

Beginner Amateur Radio Prediction Problem Collection 2021 Edition / Edited by: Beginner Ham National Examination Problem Study Group

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https://www.seibundo-shinkosha.net/book/hobby/51050/