==tài liệu tham khảo====liên kết ngoài==*abraham lincoln's physician's observation and postmortem reports original documentation shapell manuscript foundation*first responder dr charles leale eyewitness report of assassination*lincoln papers lincoln assassination introduction*original documents online lincoln assassination papers*april 14th 1865 ford's theatre ticket*ford's theatre national historic site*abraham lincoln's assassination*abraham lincoln a resource guide from the library of congress*lincoln conspiracy photograph album at george eastman museum*the men who killed lincoln  slideshow by life magazine*the lincoln assassination new research unravels old myths*booknotes interview with edward steers jr on blood on the moon the assassination of abraham lincoln february 17 2002