Source: https://www.si.com/vault/1981/08/24/825881/some-fast-women-but-few-free-men-while-mary-t-meagher-who-set-two-world-records-in-the-butterfly-and-other-ladies-excelled-at-the-us-long-course-championships-there-was-a-serious-drought-in-the-male-freestyle-events