This petite, gifted former child performer had appeared in more than 50 television shows by the time she won Broadway fame at age 12 in "The Miracle Worker". Patty Duke won an Oscar for reprising her role as the young Helen Keller in the 1962 screen adaptation. In 1979, she won an Emmy for playing Keller's teacher--the role originally played on Broadway by Anne Bancroft--in a TV…
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