المؤلفون: Fleitz, Elizabeth J.
Advisors: Albertini, Bill
URL: http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1112551802Test
المؤلفون: Edwards, Jannie
URL: https://era.library.ualberta.ca/items/634a4591-69e1-43d2-a398-d7353506fd37/view/3976afe9-fa0f-4a55-a048-2f749b30f048/ML55553.pdfTest