• For most print and online publications, the publisher is usually a copyright holder capable of providing permission. If you cannot identify the copyright holder, you may need to request a search from the United States copyright office.
• It is important to note that a lack of response from the copyright holder does not, under United States law, convey permission.
• In addition, some works may contain materials-text, images and graphics-from multiple copyright holders and may require a separate authorization from each one.
• Simply acknowledging the source of content is not a substitute for copyright permission.
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