Published by John B. Pierce Foundation, New York NY, 1940
Seller: Chequamegon Books, Washburn, WI, U.S.A.
hardcover. Condition: very good. no jacket. 1st printing. Hardcover, 52 pages + appendix and index. appendix titled The Roentgenologic Diagnosis of Pneumoconiosis (Silicosis) and use of the "Electric Eye" to Determine Regional Densities by Lewis Gregory Cole and William Gregory Cole. some rubbing and handling to covers.