See also: Racah's symbol[?], Racah's V-coefficient[?], Racah's W-coefficient[?], Racah-Wigner calculus[?]
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... 190s 200s 210s 220s 230s - 240s - 250s 260s 270s 280s 290s Years: 237 238 239 240 241 - 242 - 243 244 245 246 247 Events Patriarch Titus[?] succeeds Patriarch ...