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OED, EncartaWED.
Нет
в НБАРС.
EncartaWED: missiology [mмssee уlljee] noun. study of
missionary work: the
study of Christian missionary work
Random:
the theological study of the mission of the church, esp. the character
and purpose of missionary work.
OED: The study of the methods, purpose,
etc., of religious missions.
¿ 22.12.01 V