Betz Handbook of Industrial Water Conditioning (8th) Eighth Edition

8th Edition, 1980, first printing, a new, unread, unworn, unopened, unmarked slightly oversized hardcover, with an equally fine unclipped ($32.50) dust jacket, from BETZ. By the engineering and technical staff of BETZ. No ISBN or UPC. Library of Congress Catalog Card Number: 7956368. The book measures approx. 7" X 10" X 1" and has 440 pages.