craschworks

Benford, J.R. & Husen, H. – “Practical Ferrocement Boatbuilding” 3rd edition 1972 Internationakl Marine Publishing Company, Camden, Maine 04843 USA

Bingham, B. – “Ferrocement: Design, Techniques, Application” 1974 Cornell Maritime Press Inc. Cambridge, Maryland 21613 USA;

Whitener, J.P. – “Ferrocement Boat Construction” – 1971 – publisher see above.

This is all very old stuff, techniques may have changed and I am certain that there are some people around who know how to set up a structural repair.
For a start, a more detailed damage report would be of interest.

Cairncross, C. “Ferrocement Yacht Construction”- 1973, Adlard Coles, London 1973