From Melungeon-L Archives:
In 1957, Calvin L. Beale published “American Triracial Isolates: Their Status and Pertinence to Genetic Research.: With his kind permission, this article is posted at the MHA website at http://www.melungeon.org/index.cgi?BISKIT=1993643145&CONTEXT=cat&cat=10055
The article also includes a table showing the population of triracial people by countyin 17 states as listed in the 1950 Census; that table is found at http://www.melungeon.org/index.cgi?&CONTEXT=cat&cat=10056
Last but not least,you can read Mr. Beale’s presentation at Fifth Union
at http://www.melungeon.org/index.cgi?BISKIT=780415752&CONTEXT=cat&cat=10044