TY  - BOOK
AU  - Williams,George C.
TI  - Group selection
SN  - 202040101
AV  - QH366.2 .W55
PY  - 1971///
CY  - New Brunswick, N.J.
PB  - AldineTransaction, A Division of Transaction Pub.
KW  - Group selection (Evolution)
KW  - Animal populations
N1  - Originally published: Chicago : Aldine Atherton, 1971
ER  -