Template:Address restricted/Reference note
{{citation | last1 = Knoerl | first1 = John | last2 = Miller | first2 = Diane | last3 = Shrimpton | first3 = Rebecca H. | date = 1990 | title = Guidelines for Restricting Information about Historic and Prehistoric Resources | series = National Register Bulletin | issue = 29 | publisher = National Park Service, U.S. Department of the Interior | url = https://archive.org/details/guidelinesforres00knoe | oclc = 20706997 }}.