promotional
- https://www.dead.net/archives/1971/clippings/wb-publication-circular-back-cover
- https://www.dead.net/archives/1972/clippings/promotion-72-1-5
- https://www.dead.net/archives/1972/clippings/promotion-72-2-5
- https://www.dead.net/archives/1972/clippings/promotion-72-3-5
- https://www.dead.net/archives/1972/clippings/promotion-72-5-5
- https://www.dead.net/archives/1972/clippings/promotion-72-4-5
