1. 1940 The biology of the Weddell and crabeater seals. British Graham Land Expedition, 1934-1937. Scientific Reports, Vol. 1, pp. 1-139.
2. 1882 A monograph of the seal islands of Alaska. U. S. Commission of Fish and Fisheries, Special Bull. 176, Washington.
3. 1884 The seal islands of Alaska. In: Tenth Census United States 1880, Vol. 8, Special Reports, Washington, pp. 1-188.
4. 1899 The breeding habits of the Pribilof fur seal. In Jordan et al., The fur seals and fur-seal islands of the North Pacific Ocean, Washington, part 3, pp. 43-57.