1. Anti-contagionism between 1821 and 1867;ACKERKNECHT E. H.;Bull. Hist. Med.,1948
2. Crawford's animalcular hypothesis of epidemics;ANONYMOUS.;Med. Repository,1807
3. CORDELL E. F. 1903. The medical annals of Maryland 1799-1899 p. 758-770. Williams & Wilkins Co. Baltimore.
4. The
5. Remarks on quarantine suggested by Dr. Caldwell's oration;CRAWFORD J.;Observer,1807