@article{van der Geest2011a,
author = {van der Geest, K.A.M.},
title= {North–South migration in Ghana: What role for the environment?},
year = {2011a},
doi = {10.1111/j.1468-2435.2010.00645.x},
volume = {49},
number = {S1},
pages = {e69--e94},
}