v. 1. From exploration to statehood, by A.E. Smith
v. 2. The Civil War era, 1848-1873, by R.N. Current
v. 3. Urbanization and industrialization, 1873-1893 [by] Robert C. Nesbit
v. 4. The progressive era, 1893-1914 [by] John D. Buenker
v. 5. War, a new era, and depression, 1914-1940 [by] Paul W. Glad
v. 6. Continuity and change, 1940-1965 [by] William F. Thompson.