1989
M. King Hubbert, American geologist and academic (born 1904)
M. King Hubbert, American geologist and academic (born 1904)
M. King Hubbert, American geologist and academic (born 1904)
American geologist (1903–1989)
M. King Hubbert, American geologist and academic (born 1904)
M. King Hubbert, American geologist and academic (born 1904)
M. King Hubbert, American geophysicist and academic (died 1989)
M. King Hubbert, American geophysicist and academic (died 1989)