They included coverage of all administrative zones, cities, demographic statistics, ethnic groups, language and dialects, economic situation, transportation, education, medicine.[2] The volume is prefaced with "Definition Of What Constitutes Adequate Missionary Occupation," by Robert E. Speer, a leading American proponent of Protestant missions.Speer defines "adequate missionary occupation" as first, "establishing within a reasonable time an indigenous Church, which through its life and work will propagate Christianity and leaven the nation or field within whose borders it stands."Speer's second criterion is that, "in cooperation with this Church, of presenting Christ to every individual with such clearness and completeness as to place upon him the responsibility of acceptance of or rejection of the Gospel."[3] Lobenstine, as executive secretary of the Continuation Committee, wrote that "the coming period is expected to be one of transition, during which the burden of the work and its control will increasingly shift from the foreigner to the Chinese."