"Temple Bells Voice," the final section of Toshio Hosokawa's Voiceless Voice in Hiroshima, a requiem for the composer's native city. The text is a haiku by Matsuo Bashō: "tsuki izuki / kane wa shizumeru / umi no soko" ("Where is the moon? / The temple bell is sunk / At the bottom of the sea").
At the New Yorker website, you can read, in its terrifying entirety, John Hersey's 1946 article "Hiroshima." It was preceded by a note: "The New Yorker this week devotes its entire editorial space to an article on the almost complete obliteration of a city by one atomic bomb, and what happened to the people of that city. It does so in the conviction that few of us have yet comprehended the all but incredible destructive power of this weapon, and that everyone might well take time to consider the terrible implications of its use. — The Editors."