Statistical report on the sickness and mortality in the army of the United States : compiled from the records of the surgeon-general's office, embracing a period of 16 years, from January 1839 to January 1855 / Prepared under the direction of bvt. brig. general Thomas Lawson, surgeon-general U. S. Army, by Richard H. Coolidge, M. D. assistant surgeon U. S. Army ;Senate 34th Congress, 1st session Ex. Dec. N° 96