Analysis of information sources in references of the Wikipedia article "Lawrence Sperry" in English language version.
Although she fell 800 feet in a hydro-aeroplane and was held fast for more than a minute in mud and wreckage seven feet under water, and suffered a fracture of the pelvis and other injuries, Mrs. Waldo Pierce(sic), daughter of Mrs. Isaac L. Rice, donor of the $1,000,000 fund for the Isaac L. Rice Hospital for Convalescents, has no intention of giving up flying.
Another son, Lawrence B., lost his life in 1925 while flying over the North Sea in a plane of his own design. ...
