U fiirso marinka hoose ka dibna ka jawaab su'aasha kadib isla luqadda marinka: Marinka: Jaamacadda Texas School of Public Health, Master Degree ee Caafimaadka Dadweynaha 1994, Su'aal: goorma ayaa la aasaasay dugsiga caafimaadka dadweynaha?
Sannadkii 1994