TY  - RPRT
A1  - Barro, R.J.
A1  - Sala-i-Martin, X.
T1  - Economic growth and convergence across the United States
Y1  - 1990
DO  - 10.3386/w3419
PB  - National Bureau of Economic Research
CY  - Cambridge
IS  - Working Paper 3419

ER  -