1968. No Edition Stated. 240 pages. This is an ex-Library book. Pictorial paperback. Expected library inserts, stamps and inscriptions. From the Molecular and Cellular Biology series. Pages have slight foxing, tanning and minor thumbing. Text block edges slightly dented and rubbed. Paper cover has minor wear with slight marks, creases, some sunning and modest edge wear. Spine very sunned and a bit creased.