The Directory and calendar of prayer
Place of publication: Boston
Language: eng
Subjects: Periodicals; Missions
Other titles: American Board directory and calendar of prayer
Notes: 19 -37, Year book of missions; 1938-54, Year book of the American Board of Commissioners for Foreign Missions; 1955- American Board year book and calendar of prayer; -1959/60, American Board directory and calendar of prayer.

1959 issue covers January-September; beginning with issue for 1959/60, directory year ends September 30.