su eclipsearchive.org:

The Matrix (1970)
http://eclipsearchive.org/projects/MATRIX/Matrix.pdf

e

EECCHHOOEESS (1971)
http://eclipsearchive.org/projects/ECHOES/Echoes.pdf

+ materiali e informazioni presenti e linkati in
https://jacket2.org/commentary/nh-pritchard
http://jacket2.org/commentary/pritchard-1978 
e http://jacket2.org/commentary/grundy-pritchard

grazie a Charles Bernstein e Jacket2

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