共 41 条
[4]
Ades A., 1997, J ECON GROWTH, V2, P279, DOI DOI 10.1023/A:1009782809329
[6]
Allen R. G., 1998, FAO IRRIGATION DRAIN
[7]
[Anonymous], 1996, The CIA World Factbook
[8]
[Anonymous], 2001, 8114 NBER
[9]
[Anonymous], 1999, The Spatial Economy: Cities, Regions, and International Trade
[10]
[Anonymous], 12093 NBER