Graham, Tom M. Biology, the essential principles / Thomas M. Graham. - 2nd ed. - Dubuque,Iowa : Kendall/Hunt Pub., c1987. - xix, 748 p. : ill. (some col.) ISBN: 0030578388 Subjects--Topical Terms: Biology. LC Class. No.: QH308.2 / .G723 Dewey Class. No.: 574�19