File:Wasserstoff.jpg

Summary
Cover of German version of book

Source: here

Fair use rationale for use in The Hype about Hydrogen. The use of the image in the article The Hype about Hydrogen qualifies under the fair use doctrine under the copyright laws because:
 * it is a low resolution copy;
 * it cannot be replaced by a substitute;
 * it will not diminish the income for the image by the copyright holder; and
 * the image is being used to for the purposes of comment and education regarding the subject book, as it is the primary representation of the German version of the book.