por Manning, George Phillip, 1893- [autor] | Gray, W. S. (William Samuel). Reinforced-concrete reservoirs and tanks.
por Gray, W. S. (William Samuel) [autor] | Mannining, George Phillip, 1898- [editor].
por Gray, W. S. (William Samuel) [autor].
por Wentworth-sheilds, Francisc Ernest, 1869 [autor] | Gray, W. S. (William Samuel) [autor].