Hubert Howe Bancroft, The Works of Hubert Howe Bancroft vol. 33: History of Alaska, 1730–1885 (1886) online
archive.today
Michael Tadman, "The Demographic Cost of Sugar: Debates on Slave Societies and Natural Increase in the Americas," The American Historical Review Dec. 2000 105:5 online
books.google.com
Percy Wells Bidwell, Rural economy in New England at the beginning of the nineteenth century (1916) full text online
