Sir Charles Lyell (1837). “Principles of Geology: Being an Inquiry how Far the Former Changes of the Earth's Surface are Referable to Causes Now in Operation”, p.244
Alexander Agassiz (1888). “A Contribution to American Thalassography: Three Cruises of the United States Coast and Geodetic Survey Steameer "Blake", in the Gulf of Mexico, in the Caribbean Sea, and Along the Atlantic Coast of the United States, from 1877 to 1880”
Alexander Agassiz (1888). “A Contribution to American Thalassography: Three Cruises of the United States Coast and Geodetic Survey Steameer "Blake", in the Gulf of Mexico, in the Caribbean Sea, and Along the Atlantic Coast of the United States, from 1877 to 1880”