Science encyclopedia : pockets / by Burnie, David, author, Challoner, Jack, author, Eden, Philip, author, Guth, William A., author, Hall, Cully, author, Kaufmann, Jeffrey, author, O'hara, Scarlett, author, Setford, Stever, author, Storr, Carole, author, Twist, Clint, author, Yasso, Warron, author