File:Psi uc lc 2.svg is a vector version of this file. It should be used in place of this PNG file when not inferior. File:Psi uc lc 1.png → File:Psi uc lc...
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was published (or registered with the U.S. Copyright Office) before January 1, 1929. Public domain works must be out of copyright in both the United States...
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