Who won the womens singles in the 1958/1959 season?
CREATE TABLE "table1_12266757_1" (
  "season" text,
  "mens_singles" text,
  "womens_singles" text,
  "mens_doubles" text,
  "womens_doubles" text,
  "mixed_doubles" text
);
SELECT "womens_singles" FROM "table1_12266757_1" WHERE "season"='1958/1959';