Immurana, Mustapha, and Arabi Urma. 2016. “Demand for Measles and Yellow Fever Vaccines for Children in Ghana: Are Socio-Economic, Demographic and Geographic Factors Relevant?”. International Journal of Accounting and Economics Studies 4 (2): 136-41. https://doi.org/10.14419/ijaes.v4i2.6526.