- “ Biographies – Mr. Frederic Clare Underhilll – Life member ”, – BCLS Proceedings 1965, ABCLS, pp 102.
- “ Biographies – Mr. James Theodore Underhilll – Life member ”, – BCLS Proceedings 1965, ABCLS, pp 103.
- O’Keefe, Betty and MacDonald, Ina (2004) “Dr. Fred and the Spanish Lady – Fighting the Killer Flu”, Heritage House Publishing Company Ltd., ISBN 1-894384-71-7 pp
- “The McGill Annual”, Vol 3, 1911, Published by the Students of McGill University College of BC
- “Ernest Albert Cleveland”
- Cleveland Dam Picture – Wikipedia
- www.chapmansurvey.com
- “Frederic Clare Underhill, P.Eng, DLS, BCLS, Lt. Col. RCA: 1891-1982 (22 May).”, BCLS Proceedings 1983, ABCLS, pp144-145.
- Miller, Diane (2001) “Underhill, James Theodore”
- “Professional Land Surveyors of BC: Cumulative Nominal Roll”, 5th July 2010, ABCLS, Victoria
- BC Archives – Frederic Underhill – Irene Creery Marriage Certificate, BC Archives – J. T. Underhill – Florence Hermon Marriage Certificate
- “1911 Census of Canada Indexing Project”
- www.hermonsurveys.com
- “Horace M. Fraser Dies in Vancouver”, Cariboo Observer – Thursday, May 25, 1950
- Bilsland, W.W. & Ireland, W.E (1971) “Atlin 1898 – 1910 : The Story of a Gold Boom”, Reprinted from the British Columbia Historical Quarterly by Atlin’s Centennial Committee.
- “Appointments: James A. Fraser of Atlin”, Victoria Daily Colonist, Friday, June 6, 1902, pp 2
- “Altin – Wrigley’s BC Directories”
- Keopke, T.E. (2011) “Email Correspondance Re: Horace McNaughton Fraser”, U&U Archives, Burnaby
- Munday, Don (1948),“The Unknown Mountain”, Hodder & Stoughton Ltd., pp 123-125
- “Plan of Traingulation of Klinakline River Valley, Range 2, Coast District”(1927), BC Plan 11T284, Crown Lands, Victoria, BC
- Veterans Affairs Canada – Virtual War Memorial
- Underhill, Helen (2002), “Memories of the Golden Years”, The Link Magazine, Dec 2002, ABCLS, pp 14.
- Underhill & Underhill Corporate Records, Burnaby, BC
- Curta Calculator – Wikipedia
- Underhill, C.D. (1996), “Arthur Thomas Holmes, BCLS, P.Eng. 1912-1996”, BCLS Proceedings 1997, ABCLS, pp. XXXIV
- Gordon, Katherine(2006) “Made to Measure – A History of Land Surveying in British Columbia”, Sonon Nis Press, 2006, ISBN 1-55039-153-4
- www.hpmuseum.org
- Miller, Diane (2001) “Underhill, Frederic Clare”, View on Roots Web
- Vancouver Public Library, “BC City Directories 1860-1955”
- “Triangulation of Nalau Hakai & Edward Channels, Range 2, Coast District” (1921), BC Plan 2T251, Crown Lands, Victoria, BC
- Lewall, Jim (2006), “Lewall Inlet”
- Allen, Robert (2007), “Bernard (Bill) Cecil Lewall, BCLS #237, P.Eng.”, The Link Magazine, March 2007, ABCLS, pp 40.
- Underhill, J.T. (1921), Bridge Scores in back of U&U Field Books 32&34.
- “Triangulation of Kildidt Lagoons & Bryden Channel, Range 2, Coast District”(1921), BC Plan 3T251, Crown Lands Victoria, BC
- Miller Diane (2001), “Underhill, John Edward”, View on Roots Web
- Turnbull, Frank A. (1996) “Operating on the Frontier: Memoirs of a Pioneer Canadian Neurosurgeon”, Harbour Publishing
- Underhill, J.T (1921), Notes in back of U&U Field Book 33.
- CMAJ September 5, 2000; 163 (5), Deaths – Dr. Frank Turnbull
- Wills, A.J.(2003) “Obituaries: Anne Barbary Underhill, 1920-2003”, A&G
- Anne Barbara Underhill (1920-2003) – Astro Canada
- Roman, N.G.(2003) “Obituaries: Anne Barbara 1920-2003”, Bulletin of the American Astronomical Society, v. 35, no. 5, p. 1476-1477
- Morton, D. (2003) “Anne Barbara Underhill 1920-2003”, Cassiopeia, No. 118, Sept 2003
- 2154 Underhill, JPL Small-Object Database Browser
- Collier, Dan (2007) “gif video of 2154 Underhill”, from archived webpage, Dan is an amature astronomer, and ham radio operator in Vancouver, Canada.
- Stanley P. Frankel, Unrecognized Genius
- The Story of Mel, A Real Programmer
- computerhistory.org – Royal Precision Electronic Computer
- The Inuvialuit Final Agreement
- The Gwich’in Comprehensive Land Claim Agreement
- Sahtu Dene and Metis Final Agreement
- The Nunavut Land Claims Agreement
- Council of Yukon First Nations (CYFN) – Umbrella Final Agreement
- Tlicho Agreement
- The Maa-Nulth Final Agreement
- “Warming up the LGP-30” – on YouTube
- Cotton, H.B. (2007) “Edward Stephen Wilkinson, C.E., L.S.”, The L.S. Group British Columbias’a First Land Surveyors, The Association fo BC Land Surveyors, Friesens, 2007, pp. 362
- Surveyor General File 030455 (1921), BC Archives, Victoria, BC
- Surveyor General File 074869 (1927-1928), BC Archives, Victoria, BC
- Juhl, Ginger M. (1990) “B.C. Hydro Automates a Province”, GIS World, Aug-Sep 1990, p. 28-31
- Update provided by Ted Lewall, son of Bernard Cecil (Bill) Lewall, October, 2021