1946. No Edition Remarks. Unpaginated. This is an ex-Library book. BIOS Final Report No 1379, Item No's 7 & 22. Plastics in German Sound Recording Systems. Paperback book with green cover. Library stamp to front cover. Pages are mostly clean overall, with moderate tanning throughout. Staple binding is firm with noticeable rust. Text is unaffected. Paper covers have mild edge wear with creasing & scuffing. Visible sunning to spine. Rust marks to covers.