Scagel, Robert Francis, 1921- An evolutionary survey of the plant kingdom / by Robert F. Scagel ... et al. - Belmont, Ca.: Wadsworth Publishing Co., 1965 - xi, 658 p. : ill. ; 26 cm. - The Wadsworth botany series . Includes bibliographies LCCN: 65-014832 Subjects--Topical Terms: Botany