Faulkner, Edward H. A Second Look. Norman, Oklahoma: University of Oklahoma Press, 1947. 193 p. $2.00. Vogt, W. Road to Survival. New York: William Sloane, 1948. 301 p. $4.00. Pearson, Frank A., and Harper, Floyd A. The World's Hunger. Ithaca: Cornell Univesity Press, 1945. 83 p. $1.50. United Nations. Soil Conservation, An International Study. F.A.O. Agricultural Series 4, Washington, D. C.: H. K. Press, 1948. 189 p. $2.00. Pfeiffer, Ehrenfried. The Earth's Face and Human Destiny. Emmaus, Pennsylvania: Rodale Press, 1947. 174 p. $2.75