(135) Brown, Harrison, The Challenge of Man 's Future. (New York: Viking, 1954.)
(136) Calder, Nigel, (ed.), The World in 1984. (Baltimore: Penguin Books. 1965.), (2 vols.)
(137) Clarke, Arthur C., Profiles of the Future. (New York: Bantam Books, 1958.)
(138) De Jouvenel, Bertrand, Futuribles. (Santa Monica, Calif.: The RAND Corporation, January, 1965.)
(139) De Jouvenel, Bertrand, The Art of Conjecture. (New York: Baste Books, 1967.)
(140) Drucker, Peter F., America's Next Twenty Years. (New York: Harper & Row, 1955.)
(141) Drucker, Peter F., The Age of Discontinuity. (New York: Harper & Row, 1968.)
(142) Duffus, R. L., Tomorrow's News. (New York: W. W. Norton, 1967.)
(143) Ernst, Morris L., Utopia 1976. (New York: Rinehart, 1955.)
(144) Ewald, Willam R, Jr., (ed.), Environment For Man. (Bloomington, Ind.: Indiana University Press, 1967.)