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'Concrete Boatbuilding, Its Technique and Its Future' by Gainor W Jackson and W Morley Sutherland.
Published 1969 by George Allen and Unwin Ltd London.
A rousing treatise on the noble art of concrete boatbuilding. Long out of print and a highly desirable item for concrete boat enthusiasts. Contains easy to follow instructions for making your own concrete sailing boat.
Armed with this book you could conceivably rebuild a concrete barge nine times the size of the original and park it at Canvey Point.. Boy that would hack them off!