Title: World Amateur Go Championship (1st-13th) [Kido Special Supplement]
世界アマチュア囲碁選手権戦 第1回～第13回 [別冊棋道]
Publisher: Nihon Kiin 日本棋院
This set of Kido magazine special supplements covers the first 13 WAGC from 1979 to 1991. Not sure if Kido published any further special supplement coverage of the event after the 13th WAGC. Rare to be able to collect such a set.
Trivia: Which well-known KGS player represented Argentina in the 1st WAGC?