Dunn, Seth. Hydrogen futures : toward a sustainable energy system / Seth Dunn. - Washington, DC : Worldwatch Institute, c2001. - 90 p. : ill. ; 22 cm. - Worldwatch paper ; 157 . "August 2001." Includes bibliographical references (p. 79-90). Subjects--Topical Terms: Hydrogen as fuel. LC Class. No.: TP359.H8 / D86 2001