SELECT size FROM table_name_61 WHERE year_joined < 1974 AND ihsaa_class = "aa" AND _number___county = "89 wayne" AND school = "centerville"
Berapa ukuran Centerville di 89 Wayne County dengan kelas AA IHSAA di tahun sebelum 1974?
CREATE TABLE table_name_61 (size VARCHAR, school VARCHAR, _number___county VARCHAR, year_joined VARCHAR, ihsaa_class VARCHAR)