The Archives of the Explorers Club Membership Files (Deceased Members) "Archived copy"(PDF). Diarsipkan dari versi asli(PDF) tanggal 2009-01-05. Diakses tanggal 2007-10-14.Parameter |url-status= yang tidak diketahui akan diabaikan (bantuan) and http://www.explorers.org/
familysearch.org
"United States Social Security Death Index," index, FamilySearch (https://familysearch.org/pal:/MM9.1.1/VSFC-CW5 : accessed 22 Feb 2013), Melville Cummin, December 1, 1980; citing U.S. Social Security Administration, Death Master File, database (Alexandria, Virginia: National Technical Information Service, ongoing).
fleurwerks.com
The Archives of the Explorers Club Membership Files (Deceased Members) "Archived copy"(PDF). Diarsipkan dari versi asli(PDF) tanggal 2009-01-05. Diakses tanggal 2007-10-14.Parameter |url-status= yang tidak diketahui akan diabaikan (bantuan) and http://www.explorers.org/
web.archive.org
The Archives of the Explorers Club Membership Files (Deceased Members) "Archived copy"(PDF). Diarsipkan dari versi asli(PDF) tanggal 2009-01-05. Diakses tanggal 2007-10-14.Parameter |url-status= yang tidak diketahui akan diabaikan (bantuan) and http://www.explorers.org/
