The nature of living things, by C. Brooke Worth & Robert K. Enders. Illustrated by Robert Barrell. Worth, C. Brooke (Charles Brooke), 1908- Enders, Robert K. (Robert Kendall), 1899-1988, joint author. Biology. QH309 .W6 574 WON [New York] New American Library [1955] [1955] 1955 Text 198 p. eng Signet key books, Ks326