History of planet
1959 6 pgs MapCom View
1972 3 pgs MyersM View
1982 9 pgs LawrenceP View
1985 8 pgs CooperK View
1990 1 pg  BecknerF View
1997 11/15 3 pgs GlassD View
N/A 7 pgs HalvorsonC View
N/A 3 pgs Jesusonian View
N/A 1 pg  MasonL View
N/A 3 pgs Newsweek View
N/A 2 pgs Unknown View
N/A 4 pgs Unknown View
N/A 7 pgs Unknown View