Ischua 1874 Gazetteer - Includes a brief history of Ischua and a list of residents transcribed from the 1874 Gazetteer and Business Directory of Cattaraugus County
Ischua Census - Census indices for 1820 1850 1855 1865 1875 and 1892
Ischua Surname Index - A list of surnames and brief biographies transcripted from Historical Gazetteer and Biographical Memoir of Cattaraugus County published in 1893
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