IV. SOCIAL CONTACTS IN PRIMARY GROUPS
(1) Sumner, Wm. G. Folkways. A study of the sociological importance of usages, manners, customs, mores, and morals. "The In-Group and the Out-Group," pp. 12-16. Boston, 1906.
(2) Vierkandt, Alfred. Naturvölker und Kulturvölker. Ein Beitrag zur Socialpsychologie. Leipzig, 1896.
(3) Pandian, T. B. Indian Village Folk. Their Works and Ways. London, 1897.
(4) Dobschütz, E. v. Die urchristlichen Gemeinden. Sittengeschichtliche Bilder. Leipzig, 1902.
(5) Kautsky, Karl. Communism in Central Europe in the Time of the Reformation. Translated by J. L. and E. G. Mulliken. London, 1897.
(6) Hupka, S. von. Entwicklung der westgalizischen Dorfzustände in der 2. Hälfte des 19. Jahrhunderts, verfolgt in einem Dörferkomplex. Zürich, 1910.
(7) Wallace, Donald M. Russia. Chaps. vi, vii, viii, and ix. New York, 1905.
(8) Ditchfield, P. H. Old Village Life, or, Glimpses of Village Life through All Ages. New York, 1920.
(9) Hammond, John L., and Hammond, Barbara. The Village Labourer, 1760-1832. A study in the government of England before the reform bill. London, 1911.