@article{Gallup1999,
author = {Gallup, J.L. and Sachs, J.D. and Mellinger, A.D.},
title= {Geography and economic development},
year = {1999},
doi = {10.1177/016001799761012334},
journal = {International Regional Science Review},
volume = {22},
number = {2},
pages = {179‒232},
}