- Libro electrónicoThe New Beachcomber's Guide to the Pacific NorthwestJ. Duane Sept
- Libro electrónicoThe Beachcomber's Guide to Seashore Life in the Pacific NorthwestJ. Duane Sept
- Libro electrónicoAtlantic Seashore Field GuideJ. Duane Sept
- Libro electrónicoA Photographic Guide to Seashore Life in the North AtlanticJ. Duane Sept