TY  - BOOK
AU  - Smith, T. Lynn
AU  - Zopf, Paul E.,
TI  - Demography: principles and methods 
SN  - 0882840339
AV  - HB881 .S599 1976
U1  - 312 
PY  - 1976///
CY  - Port Washington, N.Y.
PB  - Alfred Pub. Co.
KW  - Demography
N1  - Includes index and  bibliographical references
ER  -