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147. Pyle, W. H., and Collings, P. E., The Mental and Physical Development of Rural Children. Sch. and Soc., 1918, (8), 534ff.

148. Ripley, W. Z., The Races of Europe. New York: D. Appleton and Co., 1899, 536-558.

149. Robinson, J. H., and Beard, C. A., Development of Modern Europe. Boston: Ginn and Co., 1907, (I), 28-29. 150. Ross, E. A., Principles of Sociology. New York: Century, 1920, 13-26.

151. Tuttle, T. D., Death Rates in Old and Young States. Am. J. of Pub. Health, 1917, (7), 359ff.

152. Vogt, P. L., Introduction to Rural Sociology. New York. New York: Appleton, 1917, 140-155.

153. Wood, F., American Men of Science and the Question of Heredity. Sci., 1909, (30), 209.

154. Woods, E. B., Heredity and Opportunity. Amer. J. of Sociol. 1920, (26), lff.

155. Yoakum, C., and Yerkes, R., Army Mental Tests. New York: H. Holt, 1920, 196-200.

156. Yule, G. U., An Introduction to the Theory of Statistics. Philadelphia: J. B. Lippincott, 1912, 204-207.

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