By the equator's snowy peak a record of medical missionary work and travel in British East Africa by E May Crawford

http://www.archive.org/details/equatorssnowype00crawuoft

The world mission of the Christian religion, by Wade Crawford Barclay; C.A. Bowen, D.D., general editor.

http://www.archive.org/details/worldmissionofth012478mbp

Arthur Douglas : missionary on Lake Nyasa, the story of his life

http://www.archive.org/details/arthurdouglasmi00douguoft