TY  - BOOK
AU  - Smith, T. Lynn
AU  - Zopf, Paul E.,
ED  - 
ED  - 
ED  - 
ED  - 
SN  - 803679203
SN  - 2
PY  - 1970///46
CY  - Philadelphia
PB  - F. A. Davis Co
KW  - 
KW  - 2
KW  - 0
KW  - 6
KW  - 20
KW  - Demography
N1  - Includes bibliographies; 5
ER  -