TY  - JOUR
A1  - Seal, H.L.
T1  - The mathematics of a population composed of k stationary strata each recruited from the stratum below and supported at the lowest level by a uniform annual number of entrants
Y1  - 1945
DO  - 10.2307/2332300
JF  - Biometrika
VL  - 33
IS  - 3
SP  - 226
EP  - -230

ER  -