Here are some sources that may be of help - if you have any questions, just let me know,
34th Regiment Mississippi Infantry
Autry, George Monroe. [Pvt., Co. K] Recollection. Located in the Mary Autry Greer
Papers, University of Texas at Arlington Library, University of Texas, Arlington,
Boone, David B., Jr. Honor Without a Stain: The Story of the 34th Mississippi Infantry
Regiment, 1862-1865. (Philadelphia, PA: Xlibris, 2002).
Rogan, Lafayette. [2nd Lt., Co. B] Diary, 1864. A copy is in the collections of the Old
Court House Museum, Vicksburg, MS.
Spight, Thomas. [Capt., Co. B] Eight letters, 14 December 1860 – 5 February 1865.
Catalog # M47, McCain Library, University of Southern Mississippi, Hattiesburg,
MS. Spight also served in the 2nd Regiment Mississippi Infantry, Formerly 4th
Regiment, Army of 10,000 (Davidson’s).
36th Regiment Mississippi Infantry
Buckley, Reuben E. [Pvt., Co. I] Letters, 1863-1864. Located in the Buckley Civil War
Letters, Mitchell Memorial Library, Mississippi State University, Mississippi
Clarke, George Powell. [Pvt., Sgt., Co. C] Reminiscence and Anecdotes of the War for
Southern Independence. Decatur, MS: Privately published, 1996.
Fulghum, James M. [Capt., Co. K] Letter, 24 September 1862. Located in the Old
Court House Museum Collections, Vicksburg, MS. Letter describing the
battle of Iuka, MS., September 19, 1862.
Harris, Lewis Binghaman. [Capt., Co. G] Papers, 19 June 1849 – 28 February 1917.
Catalog # Z 983, Mississippi Department of Archives and History, Jackson, MS.