Herren, Ray V. Exploring agriscience / Ray V. Herren. - 3rd ed. - Clifton Park, N.Y. : Thomson/Delmar Learning, c2006. - xvi, 496 p. : col. ill. ; 27 cm. Includes index. ISBN: 1401896448 (hbk.) Subjects--Topical Terms: Agriculture--Juvenile literature. Dewey Class. No.: 630 / HER