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ancient medieval modern europe america asia africa sources secondary c20th c19th big history world ap articles journals

ancient medieval modern london england britain uk journals articles reference sources secondary c20th c19th c18th c17th c16th

modern c20th primary sources thoughts discussion

google ancient medieval modern c20th c19th sources articles journals search scholar

usa america archives c18th c19th documents us civil war revolution independence sources primary periodicals journals

ancient medieval modern europe america asia africa south rome greece britain germany russia china japan sources secondary pdfs articles journals

history newspapers resources reference journalism research buff modern europe america usa c20th sources documents primary

medieval europe britain uk navy science enlightenment england sources documents primary exploration explorers discovery america asia africa south