0.29 Sharlotte Neely Williams, The Limitations of the Male/Female Activity Distinction among Primates: An Extension of Judith K Brown's "A Note on the Division of Labor by Sex", American Anthropologist, 1971.

{ human behavior evolution social }	0.29
{ women age population female }	0.16
{ number data group table }	0.11
{ fact point evidence anthropologist }	0.09