TY  - BOOK
AU  - Langbein,Laura Irwin
AU  - Lichtman,Allan J.
TI  - Ecological inference
T2  - A Sage university paper
SN  - 0803909411 :
U1  - 300 
PY  - 1978///
CY  - Beverly Hills, Calif.
PB  - Sage Publications
KW  - Social sciences
N1  - Bibliography: p. 68-70
UR  - http://www.loc.gov/catdir/enhancements/fy0654/77093283-d.html
ER  -