Indian and white in the Northwest : a history of Catholicity in Montana, 1831-1891 / by L.B. Palladino ; with an introduction by John B. Brondel.

http://www.archive.org/details/indianandwhite00palliala

John Ludwig Krapf : the explorer-missionary of northeastern Africa / by Paul E. Kretzmann.

http://www.archive.org/details/johnludwigkrapfe00kretiala