Retouching: Corrective Techniques in Photography by O.C. Croy.

Focal Press, 1957.  First impression of second edition (no later printings indicated, was reprinted). 200 pages.  Black hardcover in cloth, lacks dust jacket, very good, small stains on flyleaves and fore edge.  Includes chemical formulas for stain removal but did not try them on book.  Includes retouching with chemicals, dyes, pigments, abrasion, pencil, etc., for negatives and prints. See photos of table of contents for details. Uncommon book for analog photography.