Worth County IAGenWeb History Books A History of Worth County, 1875 History of Mitchell & Worth Counties, 1884 Township Histories Standard Historical Atlas of Worth County, Iowa, 1913 (includes 13 pages of Worth County history - see Univ. of Iowa, Digital Library) History of Mitchell & Worth Counties, 1918 Volume 1 and contents of Vol.1 Volume 2 Worth County Heritage 1853-1976 Subjects History of Postal Service, 1889-1923 History of Worth County, by Gordon Felland Old Settler's Society Agricultural Society Halloween 1917 National Register of Historic Places in Worth County Northwood Semi-Centennial 1907