(5) Koren, John. Economic Aspects of the Liquor Problem. An investigation made for the Committee of Fifty under the direction of Henry W. Farnam. Boston, 1899.
(6) Towns, Charles B. Habits that Handicap. The menace of opium, alcohol, and tobacco, and the remedy. New York, 1916.
(7) Wilbert, Martin I. "The Number and Kind of Drug Addicts," U.S. Public Health Reprint, No. 294. Washington, 1915.
(8) Rowntree, B. Seebohm. Land and Labour: Lessons from Belgium. Chap. xxvi, "The Drink Problem." London, 1910.
(9) McIver, J., and Price, G. F. "Drug Addiction," Journal of the American Medical Association, LXVI (1915), 476-80. [A study of 147 cases.]
(10) Stanley, L. L. "Drug Addictions," Journal of the American Institute of Criminal Law and Criminology, X (1919), 62-70. [Four case studies.]
E. Crime and Competition
(1) Parmelee, Maurice. Criminology. Chap. vi, pp. 67-91. New York, 1918.
(2) Bonger, William A. Criminality and Economic Conditions. Translated from the French by H. P. Horton, with editorial preface by Edward Lindsey and with an introduction by Frank H. Norcross. Boston, 1916.
(3) Tarde, G. "La Criminalité et les phénomènes économiques," Archives d'anthropologie criminelle, XVI (1901), 565-75.