Mollusca of Peten and North Alta Vera Paz Guatemala.
Ann Arbor, MI: The University of Michigan, 1937. 8vo. 50 pp. Spine ends and corners are very lightly bumped, museum stamp to top right corner of cover . Otherwise book is in excellent condition. University of Michigan Museum of Zoology, Miscellaneous Publications No.34. Very Good Paperback (Item ID: 70451)