Baker's biographical dictionary of twentieth-century classical musicians, c1997 (Ohana, Maurice; b. June 12, 1914, Casablanca; d. Nov. 13, 1992, Paris; French composer and pianist)
The music of Maurice Ohana, 2000 p. 1 (b. June 12, 1913, Casablanca; d. Nov. 13, 1992. "By his own declaration he was profoundly superstitious and especially so in any matters involving the number thirteen.")