Gihring, Thomas (1984). "Intraurban Activity Patterns among Entrepreneurs in a West African Setting". Geografiska Annaler: Series B, Human Geography. 66 (1): 19–20. doi:10.2307/490525. JSTOR490525.
Gihring, Thomas (1984). "Intraurban Activity Patterns among Entrepreneurs in a West African Setting". Geografiska Annaler: Series B, Human Geography. 66 (1): 19–20. doi:10.2307/490525. JSTOR490525.