TY  - JOUR
A1  - Thatcher, R.
A1  - Kannisto, V.
A1  - Andreev, K.
T1  - The survivor ratio method for estimating numbers at high ages
Y1  - 2002
DO  - 10.4054/DemRes.2002.6.1
JF  - Demographic Research
VL  - 6
SP  - 1
EP  - -18

ER  -