TY  - ELEC
A1  - Maddison, A.
T1  - Historical statistics of the world economy: 1–2008 AD
Y1  - 2009
UR  - www.ggdc.net/maddison/Historical_Statistics/horizontal-file_02-2010.xls
PB  - University of Groningen, Maddison Project
CY  - Groningen

ER  -