A Guide to the Claudius Crozet Papers 1792-1832: Descriptive summary, scope and content, and biographical detail. Collection held at the Virginia Military Institute.
Claudius Crozet: Illustrated biography by Robert L. Barrett.
Col. Claudius Crozet: Brief biography and portrait.
Thomas Jefferson Letters: Correspondence from the Claudius Crozet Papers, Virginia Military Institute Archives. Images of original document and full text transcriptions.
Wikipedia: Claudius Crozet: Biography, works and related links.