Purchase, Rogers Fund and Gifts of Richard S. Perkins, Mr. and Mrs. Charles Wrightsman, Mr. and Mrs. Louis E. Seley, Walter D. Binger, Margaret Mushekian, Mrs. Mildred T. Keally, Hess Foundation, Mehdi Mahboubian and Mr. and Mrs. Bruce J. Westcott, 1974
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public domain by waiving all of their rights to the work worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law. You can copy, modify, distribute and perform the work, even for commercial purposes, all without asking permission.
http://creativecommons.org/publicdomain/zero/1.0/deed.enCC0Creative Commons Zero, Public Domain Dedicationfalsefalse