(1928-2016), דף שער בספרייה הלאומית אלווין טופלר, ברשת החברתית Goodreads Schneider, Keith (29 ביוני 2016). "Alvin Toffler, Author of 'Future Shock,' Dies
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modified March 3, 2018 Dorothy Schneider and Carl J. Schneider, Slavery in America. (New York: InfoBase Publishing, 2014), 3. Tim Hashaw, "The First Black Americans"