TY  - BOOK
AU  - Downs,James F
TI  - Human variation: an introductión to physical Anthropology
U1  - 572 
PY  - 1972///
CY  - Beverly Hills
PB  - Benziger Bruce Glencoe, inc., 
KW  - Evolucion de la humanidad
KW  - Paleontologia
KW  - Antropologia Fisica
ER  -