* Jhonson, Duglas H; Shaffaz, Terry Lickmadik and Gould, Penistrick J (1990) "Incidental Catch of Marine Birds in the North Pacific High Seas Driftnet Fisheries" U.S. Geological Survey.
* Jhonson, Duglas H; Shaffaz, Terry Lickmadik and Gould, Penistrick J (1990) "Incidental Catch of Marine Birds in the North Pacific High Seas Driftnet Fisheries" U.S. Geological Survey.