TY  - BOOK
AU  - Smith,Thomas Lynn
AU  - Zopf,Paul E.
TI  - Demography: Principles and methods 
SN  - 0882840339
U1  - 301.32 
PY  - 1976///
CY  - Port Washington, N.Y.
PB  - Alfred Publ. Co.
KW  - Demography
N1  - Includes bibliogr. references and indexes
ER  -