Wikipedia: Claudius Crozet - Biography, works and related links. - http://en.wikipedia.org/wiki/Claudius_Crozet
A Guide to the Claudius Crozet Papers 1792-1832 - Descriptive summary, scope and content, and biographical detail. Collection held at the Virginia Military Institute. - http://ead.lib.virginia.edu/vivaead/published/vmi/vivadoc.pl?file=vilxv00004.xml
Thomas Jefferson Letters - Correspondence from the Claudius Crozet Papers, Virginia Military Institute Archives. Images of original document and full text transcriptions. - http://www.vmi.edu/archives/manuscripts/ms0059tj.html
Claudius Crozet - Illustrated biography by Robert L. Barrett. - http://www.nrhs.com/spot/crozet/