Tefera, M. and Sharma, M. 2015. Determinants of Immunization Among Children Aged 12-23 Months in Ethiopia: A Proportional Odds Model Approach. International Journal of Statistics in Medical Research. 4, 1 (Feb. 2015), 140–155. DOI:https://doi.org/10.6000/1929-6029.2015.04.01.15.