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14th annual scientific, clinical and business meeting of the Society of Perinatal Obstetricians : January 24-29, 1994, Las Vegas, Nevada Vol. 170 No. 1, Part 2, [Supl.] 1994. St. Louis : Mosby-Year Book, 1994. s. 23, 264-446 [1, z toho voľných 0, prezenčne 1]