My first Internet posting?

SF-LOVERS Digest        Saturday, 24 Jul 1982      Volume 6 : Issue 24

[...]

Date: 27 July 1982 07:58 mst
From: Lippard at PCO-MULTICS (James J. Lippard)
Reply-to: Lippard%PCO-Multics at MIT-MULTICS
Subject: Samuel R. Delany

A book I would recommend for understanding Delany is "Heavenly 
Breakfast", by Delany.  It is an essay about time he spent in a
commune, and by reading it you can see where he got a lot of material
for "Dhalgren".