The mission as a frontier institution in the Spanish american colonies, by Herbert E. Bolton.

http://www.archive.org/details/missionasfrontie00boltrich

A modern pioneer in Korea the life story of Henry G. Appenzeller

http://www.archive.org/details/amodernpioneerin00grifuoft

Modern religious movements in India.

http://www.archive.org/details/modernreligiousm025064mbp

Thoughts from modern martyrs/ edited and arranged by James Anthony Walsh.

http://www.archive.org/details/thoughtsfrommode00walsuoft

The Spanish pioneers and the California missions.

http://www.archive.org/details/spanishpioneersa009682mbp

The making of modern missions, by Stacy R. Warburton.

http://www.archive.org/details/makingofmodernmi011868mbp