six gallery reading
There are numerous bios of Ginsberg and Kerouac. All of them discuss this groundbreaking reading. I'd suggest you read the germane chapters in the following books:
Ginsberg by Barry Miles
Dharma Lion by Michael Schumacher
Memory Babe - G. Nicosia
Kerouac - Ann Charters
Jack's Book: An Oral Bio by B. Gifford, et. al.