TY  - BOOK
AU  - Boyd,Robert ; Silk,Joan B.
TI  - How Humans Evolved
SN  - 9780393117783
U1  - 599.938Boy2009 
PY  - 2009///
CY  - USA
PB  - W.W. Norton & Company
KW  - Biology
N1  - Includes; references and index
ER  -