The vast majority of educators seem to believe that since they are using material for educational purposes they are completely protected through fair use exemptions. This bar code number lets you verify that youre getting exactly the right version or edition of a book the 13 digit and 10 digit formats both work. 2 2 registration is necessary before a lawsuit for copyright infringement may be filed in federal court 3 if registered within five years of publication . Note citations are based on reference standards however formatting rules can vary widely between applications and fields of interest or study
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