Hardcover, gray cloth stamped in red, no dust-jacket. 617 pages. Illustrated with photographs, drawings, tables and graphs. Sixth edition, third printing thus. Small previous owner’s label inside front cover. Not ex-library. A clean, square, unmarked copy. Cloth covers protected by well executed home-made acetate covers. A near fine copy. A heavy book, Priority and International orders will require additional postage, calculated as close to actual cost as possible.