Mendel's Law
1.B.M. Das, Outline of Physical Anthropology, Kitab Mahal (1961)
2.B.M. Das & Ranjan Deka, Physical Anthropology Practical, Kitab Mahal
3.Carol R. Ember & Melvin Ember, Cultural Anthropology (1973)
4.J. S. Olin and A. D. Franklin, Archaeological Ceramics(1982).