1829-1890 1829-1912 1886-1968 arméedusalut barth biography booth casestudies catherinemumford christiancommunities christianeducation christianity church doctrines governmentsalvationarmy greatbritain history historysalvationarmy karl leadership missions organizationaleffectiveness papuanewguinea periodicals poverty religiousaspects salvationists socialwelfare textbooks william yearbooks