1979
John Herbert Chapman, Canadian physicist and engineer (born 1921)
John Herbert Chapman, Canadian physicist and engineer (born 1921)
John Herbert Chapman, Canadian physicist and engineer (born 1921)
Canadian space researcher
John Herbert Chapman, Canadian physicist and engineer (born 1921)
John Herbert Chapman, Canadian physicist and engineer (born 1921)
John Herbert Chapman, Canadian physicist and engineer (died 1979)
John Herbert Chapman, Canadian physicist and engineer (died 1979)