By Harper Collins Publishers, Harpercollins Publishers
By Frederic M. Wheelock
By The Sun
By Scientific American Magazine
By The Times Mind Games
By Harpercollins Publishers
By Gould
By Fernald, James
By Elson, L. M., Diamond, Marian C.; Scheibel, Arnold B, Marian C., Scheibel
By Harperresource, HarperCollins, Harpercollins Publishers
By Griffin, Robert D.
By Brunskill
By Laws
By Collins