Bergh, L. S. R. (1880). Scientific results of the exploration of Alaska by the parties under the charge of W.H. Dall, during the years 1865-1874. On the nudibranchiate Gasteropod Mollusca of the North Pacific Ocean : with special reference to those of Alaska : second part / by Dr. Rudolph Bergh, Copenhagen.
Scientific results of the exploration of Alaska by the parties under the charge of W.H. Dall, during the years 1865-1874. On the nudibranchiate Gasteropod Mollusca of the North Pacific Ocean : with special reference to those of Alaska : second part / by Dr. Rudolph Bergh, Copenhagen
