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New versions

If you want to create new versions, you have two alternatives:

• To use more than the copyright limits (10% or one chapter), you should request permission from the copyright holders and explain your reasons. Most likely, they will be agreeable and no fee would be payable as long as you provide them with a copy and agree that the new version will equally fall under their copyright conditions.
• Use these materials as a research source only along with many other resources, so that your new materials are not a derivative of only these materials.

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