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by Symons, T. W. (Thomas William), 1849-1920
Published 1881 -
Index map of Upper Columbia River Survey Sheets Nos 1 to 12to accompany report of Capt T W Symons Corps of Engineers dated May 22nd 1895cartographic materialby Symons, T. W. (Thomas William), 1849-1920
Published 1895 -
Report of an examination of the upper Columbia River and the territory in its vicinity in September and October 1881to determine its navigability and adaptability to steamboat transportationBookby Symons, T. W. (Thomas William), 1849-1920
Published 1882