Enger, Eldon D. Concepts in biology / Eldon D. Enger and Frederick C. Ross - 9th ed. - Boston : McGraw Hill, c2000. - xii, 532 p. : ill. ; ill., (some col.) 28 cm. Includes index. ISBN: 0697360520 LCCN: Subjects--Topical Terms: Biology LC Class. No.: QH308.2 / .E54 2000