Tadao Umesao's Ecological View of History
　………………Masatake Matsubara
The Museum as a Non-profit Information Industry
　………………Nobuyuki Hata
Umesao's Theory of Information Industry
　………………Taku Iida
Umesao Sensei and I
　………………Harumi Befu
Remembrances of Umesao Tadao Sensei
　………………Josef Kreiner
Recollections
　………………Kwang-Kyu Lee

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