"United States Census, 1930," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/XC47-15Y : accessed 29 Jul 2013), Wilhelmina Henderson, 1930.
"United States Census, 1940," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/VBK5-32T : accessed 29 Jul 2013), W E Henderson, 1940.
https://www.mtholyoke.edu/175/gallery/caroline-boa-henderson
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