Sicp-scheme uses:
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code and an image of WB Rogers from Structure and Interpretation of Computer Programs by Harold Abelson and Gerald Jay Sussman with Julie Sussman which is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License by the MIT Press,
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an image of GJ Sussman licensed under Creative Commons License (Attribution Share-Alike) by Hal Abelson and Gerald Jay Sussman,
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an image of MH Hamilton licenced under Creative Commons License (Attribution Share-Alike) by Daphne Weld Nichols
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sbt image and image_write libraries which are licensed under the MIT Licence by Sean Barret.