World War II: The Definitive Encyclopedia and Document Collection
Primary Sources in U.S. History: World War II
Essential Library of World War I: World War I Weapons
Frontline Families: World War I: Frontline Soldiers and Their Families
Tech in the Trenches: Strategic Inventions of World War II
Military Technology: Top Secret Clearance: Warplanes of World War II Up Close
Essential Library of World War I: Medicine on the Battlefield
Defining Documents in American History: The 1900s (1900-1909)
Defining Documents in American History: World War II (1939-1946)
Defining Documents in American History: Postwar 1940s (1945-1950)
Wiesel, Wiesenthal, Klarsfeld: The Holocaust Survivors
Understanding the Holocaust: Holocaust Rescue and Liberation
World War I: The Definitive Encyclopedia and Document Collection