Herren, Ray V. Exploring agriscience / Ray V. Herren. - 3rd ed. - Clifton Park, NY Thomson/Delmar Learning, 2006. - xvi, 496 p. : hbk Includes index. ISBN: 1401896448 Subjects--Topical Terms: Agriculture--Juvenile literature. LC Class. No.: S495 / .H62 2006 Dewey Class. No.: 630