Though this image is subject to copyright, its use is covered by the U.S. fair use laws because:

• It illustrates an educational article about the illustrator of the book cover, Robert K. Abbett.
• It contributes to a critical commentary about the illustrator.
• The image is used as the primary means of visual identification of the article topics.
• The use of the cover will not affect the value of the original work or limit the copyright holder's rights or ability to distribute the original. In particular, copies could not be used to make illegal copies of the book.
• It is a low resolution image.
• The image is only a small portion of the commercial product.
• It is not replaceable with an uncopyrighted or freely copyrighted image of comparable educational value.

Though this image is subject to copyright, its use is covered by the U.S. fair use laws because:

• It illustrates an educational article about the game Jetan, a game that was invented by Edgar Rice Burroughs, described in his book The Chessmen of Mars, and illustrated on the front cover of the 1963 Ballantine Books paperback edition of this book.
• It contributes to a critical commentary about the game Jetan, being the only official illustration of that game ever released by Burroughs.
• The image is used as the primary means of visual identification of the article topics.
• The use of the cover will not affect the value of the original work or limit the copyright holder's rights or ability to distribute the original. In particular, copies could not be used to make illegal copies of the book.
• It is a low resolution image.
• The image is only a small portion of the commercial product.
• It is not replaceable with an uncopyrighted or freely copyrighted image of comparable educational value.