Sydney: [COMMONWEALTH OF AUSTRALIA], 1970. Landscape format quarto, illustrated printed wrappers, front cover embossed with Commonwealth of Australia roundel with gild detailing, front covers have turn-in flaps, approximately 24 pp. (unpaginated), leaves are of heavy textured stock. Illustrated throughout with black-and-white photographs as well as black-and-white and colour diagrams, graphics..... More

Melbourne: Department of Civil Aviation, 1947. Small slim quarto, original printed wrappers, [iv], 42 pp., ten circuit diagrams including a folding plate. In very good condition. Issued January 1947, this copy includes the errata leaf. More