Allied Radio Shack, 1971. 4th. 8Vo, Softcover. 112pp. Text is clean on unmarked, uncreased pages, b/w photos and illustrations throughout. Staplebound hinge is tight, textblock is aligned with lightly bumped corners. Minimal overall shelf/timewear, coverwear, faint page edgeblush.
Dell, 1977. 1st Ptg. 12Mo, Softcover. 220pp. Text is clean on uncreased natural pages. Textblock is square with lightly bumped corners. Some overall shelf/timewear, coverwear, full pageblush with pronounced edgeblush, some cover scratching.