CREATE TABLE table_36582 ("Year" FLOAT, "Men's singles" TEXT, "Women's singles" TEXT, "Men's doubles" TEXT, "Women's doubles" TEXT, "Mixed doubles" TEXT)

When did the Mixed double Women's singles of isabel rocha, from the year 1970, and a Women's doubles of isabel rocha ana margarida?
SELECT "Mixed doubles" FROM table_36582 WHERE "Women's singles" = 'isabel rocha' AND "Year" > '1970' AND "Women's doubles" = 'isabel rocha ana margarida'
SELECT "Mixed doubles" FROM "table_36582" WHERE "Women's doubles" = 'isabel rocha ana margarida' AND "Women's singles" = 'isabel rocha' AND "Year" > '1970'