TY  - JOUR
A1  - Watkins, S.
A1  - Warriner, I. 
T1  - How Do We Know We Need to Control for Selectivity?
Y1  - 2003
DO  - 10.4054/DemRes.2003.S1.4
JF  - Demographic Research Special Collection
VL  - 1
IS  - 4

ER  -