Friday, March 1, 2013

Henry Draper Sources

Gibson, Steven J. "DRAPER, HENRY." Henry Draper Biography. University of Calgary, 2001. Web. 01 Mar. 2013.
 
Soylent. "Henry Draper." Nndb.com. Soylent Communications, 2011. Web. 1 Mar. 2013.
 
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