Born in Kristiania ( now Oslo ) , he established Norway 's first correspondence school and his own publishing house .
Ernst Gustav Mortensen ( 17 September 1887 -- 13 October 1966 ) was a Norwegian publisher .
Born in Kristiania ( now Oslo ) , Ernst Gustav Mortensen established Norwegian 's first correspondence school and Ernst Gustav Mortensen 's own publishing house .
Ernst Gustav Mortensen ( 17 September 1887 -- 13 October 1966 ) was a Norwegian publisher .