^"Smithsonian's National Museum of American History Receives Grant to Study One of Photography's Biggest Historical Mysteries". (September 27, 2006). National Museum of American History. Press release.
^Solbert، Oscar N.؛ Newhall، Beaumont؛ Card، James g.، المحررون (مايو 1952). "The Misadventures of L.L, Hill"(PDF). Image, Journal of Photography of George Eastman House. Rochester, N.Y.: International Museum of Photography at George Eastman House Inc. ج. 1 ع. 5: 2. مؤرشف من الأصل(PDF) في 2014-07-14. اطلع عليه بتاريخ 2014-06-22.
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