This is a scan of the cover to Defenders #66, art by John Buscema, copyright Marvel Comics

http://www.comics.org/graphics/covers/2048/400/2048_4_066.jpg

Valkyrie (Marvel Comics)

Cover

Small size unsuitable to use for high quality reproduction

Image is used for purposes of illustration in the above-named article, a subject of public interest.

Image is protected by copyright, therefore a free use alternative won't exist.

Although the picture is originally copyright, it is covered by fair use because:

1. It is a low resolution copy of a comic book cover, hence, only a small portion of the commercial product;
2. The use of the image will not affect the value of the original work or limit the copyright holder's rights or ability to sell or distribute the original comic book;
3. Copies of this image could not be used to make illegal copies of the comic book;
4. The image is used as the primary means of visual identification of topics in the article. For a visual medium such as comic books, words alone cannot adequately describe the subject;