C. Hunter Shelden (5. november 1955). »Prevention, the only cure for head injuries resulting from automobile accidents«. Journal of the American Medical Association. 159 (10): 981–6. doi:10.1001/jama.1955.02960270001001. PMID13263134.
C. Hunter Shelden (5. november 1955). »Prevention, the only cure for head injuries resulting from automobile accidents«. Journal of the American Medical Association. 159 (10): 981–6. doi:10.1001/jama.1955.02960270001001. PMID13263134.