Sources list for NOTES ON IVAN THE TERRIBLE

Ivan the Terrible, First Czar of Russia, http://www.angelfire.com/weird2/andstrife/bios/ivanterrible.html
Ivan the Terrible

Richard Cavendish ,Kazan falls to Ivan the Terrible: October 2nd, 1552,
Ivan the Terrible

Ivan the Terrible, [1]http://www.dana.edu/dwarman/kmaas.htm
Ivan the Terrible

Kristin Thompson, Eisenstein's Ivan the Terrible: A Neoformalist Analysis (Princeton: Princeton University Press, 1981) 65-67.
Sergei Eisenstein

Wyatt Kingseed, "The North's only submarine, Alligator, did not live up to her reputation as a `monster' and a `terrible engine'," America's Civil War 14 (2001): 26-30.
James McPherson’s Book on the Civil War