The following is a compilation of freely-accessible academic resources related to mission. These resources are about mission generally and are not all specifically United Methodist-related.
Essays from Boston University’s Center for Global Christianity and Mission: http://www.bu.edu/cgcm/essays/
History of Missiology web: http://www.bu.edu/missiology/
Regnum Edinburgh Centenary Book Series: http://www.ocms.ac.uk/regnum/list.php?cat=3
Dictionary of African Christian Biography: http://www.dacb.org/
Journal of African Christian Biography: http://www.dacb.org/journal-acb.html