TY  - CHAP
A1  - Judson, D.H. 
A1  - Popoff, C.L. 
T1  - Selected General Methods
Y1  - 1975
A3  - Swanson, D.
A3  - Siegel, J.S.
T2  - The Methods and Material of Demography
CY  - San Diego, CA
PB  - Academic Press
SP  - 677
EP  - -732

ER  -