mailing list
- https://www.dead.net/archives/1972/clippings/dead-heads-mailing-list-counts
- https://www.dead.net/archives/1973/clippings/dead-heads-mailing-list-counts-page-2
- https://www.dead.net/archives/1973/clippings/dead-heads-mailing-list-counts-page-1
- https://www.dead.net/archives/1975/clippings/dead-heads-mailing-list-counts
- https://www.dead.net/archives/1976/clippings/dead-heads-mailing-list-counts
- https://www.dead.net/archives/1988/clippings/ticket-sales-mail-order-instructions-various-samples-1