Paperback. Zustand: Good. 5th. 4th edition, 1973. Thin pbk, unmarked text. Surafce wear on cover. Stain on back left of cover. Yellowing pages. Lh.
Paperback. Zustand: Good. 5th. Fourth edition, 1973. Top and bottom corners of the text block lightly bumped. Text and images unmarked. Embossed engineer stamp on the FFEP. Top and fore edges lightly foxed. The stapled wraps show some light handling, corners lightly bumped. 12mo. 30pp.