Armentrout, David Biofuels / David Armentrout and Patricia Armentrout. - 48p. : col. ill. 25cm. -- (Let's explore science) ISBN: 978-1-60472-321-2 Subjects--Topical Terms: III.Series.Biomass energy--Juvenile literature. Dewey Class. No.: 662.88 Ar548 c2011