1947. 63 pages. This is an ex-Library book. Paperback book with blue cover. FIAT Final Report No. 780, Methods of Measuring Scattered Light at Optical Boundary Surfaces. Library stamp to front cover. Pages are mostly clean overall, with moderate tanning throughout. Staple binding is firm with noticeable rust. Water staining to bottom edge of text block. Text is unaffected. Paper covers have mild edge wear with creasing and scuffing. Visible sunning to spine. Rust marks to covers.