The World of Microbes by Thomas G. Aylesworth
1975. First Edition. 128 pages. No dust jacket. This is an ex-Library book. Orange pictorial cloth. Pages are clean and bright with a firm binding. Endpapers and page edges are lightly tanned and foxed. Boards are a little rub worn, slight shelf wear to corners, spine and edges. Corners are a little bumped. Spine ends are mildly crushed. Tanning to spine and edges.