Softcover binding has light shelfwear and rubbing to edges of covers. Pages tight and clean with some yellowing due to age. Front bottom right corner has crease and small 'plug' missing. PO name inside. 160 pages. SoftCover Binding. Year: 1955. ISBN: 0. Covers 218 of the 350 species of mammals found in the United States and adjacent Canada. The colored plates accent features which help you to recognize the animal in its natural envionment. Pictures in full color.