"Illinois, Cook County Deaths, 1878-1922," index, FamilySearch (https://familysearch.org/pal:/MM9.1.1/N7LG-P2H : accessed 04 Feb 2013), Wm. Van Camp in entry for Guy Van Camp, 25 Dec 1917.
"United States Census, 1880," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/MD22-K19 : accessed 04 Feb 2013), Guy Vancamp, Sabula, Jackson, Iowa, United States; citing sheet 471C, family 0, NARA microfilm publication T9-0346.