Perelman, Yakov - Physics for Entertainment - Copyright Issue in the US?
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07-03-2010, 03:04 PM
Join Date: Feb 2010
IANAL, but I believe everything published in the US before 1923 is now out of copyright, and it would also be legit in life+50 countries (and in a couple of years in life+70 countries). Better to have someone else confirm that, though.
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