TY  - BOOK
AU  - Heer,David M.
TI  - Society and population
T2  - Foundations of modern sociology series
AV  - HB851 H4
PY  - 1968///
CY  - Englewood cliffs, n.j.
PB  - Prentice Hall
KW  - Población
KW  - Demografía
ER  -