Chevalier, A. 1909. La region des sources du Niger. Geographie 19. 337-352.
@article{chevalier1909,
author = {Chevalier, A.},
journal = {Geographie},
key = {Chevalier (1909)},
pages = {337-352},
title = {La region des sources du Niger},
volume = {19},
year = {1909}
}