共 82 条
[2]
Acs Z.J., 2006, INNOVATIONS, V1, P97, DOI [DOI 10.1162/ITGG.2006.1.1.97, 10.1162/itgg.2006.1.1.97]
[3]
Adepoju A., 2007, MIGRATION SUBSAHARAN
[4]
AMADJI A, 1995, 1559 WB
[5]
[Anonymous], 2007, 172007 HEI GRAD I IN
[6]
[Anonymous], J EC GEOGRAPHY
[7]
[Anonymous], TIME TRADE BAR UNPUB
[8]
[Anonymous], IFPRI CORN C THRESH
[9]
[Anonymous], 2010, RUZHYA MIKROBY STALI
[10]
[Anonymous], BROOKINGS PAPERS EC