I've found info regarding the Kosberg family from searching the BC Archives Death Registration Index http://www.bcarchives.gov.bc.ca
under Vital Events Death Registrations and found the following Dorothy (mother), children Gayle, Vincent, Marianne,Barry and Osborne "Asbjorn" (father) all died between Dec 10 to Dec 19, 1965.
Hans died Oct 24, 1951 and Anna Marie died May 27, 1977. If you should require either Death registrations or obituaries (newspaper articles etc.) please contact the Victoria Genealogical Society, PO Box 45031, Mayfair Postal Outlet, Victoria, BC V8Z 7G9 for more information.
or check out the website http://www.islandnet.com/~vgs/
Yours in Genealogy
Victoria Genealogical Society