Birds -- China -- Classification; Yan'an Shi (China); Clark, Robert Sterling, 1877-1956 -- Correspondence -- Manuscripts; Sowerby, Arthur de Carle, 1885-1954 -- Correspondence -- Manuscripts;
Note from Arthur de Carle Sowerby in Washington, D.C. to Robert Sterling Clark in which Sowerby encloses a page from the Proceedings of the Biological Society of Washington crediting Sowerby for the discovery of a species of bird. Sowerby writes in...
