folding plate – caisson, crib and coffer-dam – 1903 A Treatise on Masonry Construction by Ira O. Baker – New York, J. Wiley & Sons – Ninth Edition
folding plate – caisson, crib and coffer-dam – 1903 A Treatise on Masonry Construction by Ira O. Baker – New York, J. Wiley & Sons – Ninth Edition
