http://iai.lib.wvu.edu/catalog/iai000249http://iai.lib.wvu.edu/thumb/iai000249.jpgPerkins, Frank S. to "friend"; 03 of 04n.d.Criminology--Study and teachingPerkins, Frank S. to "friend" regarding the National Detective System, Nebraska, of which he is the president. Letter includes an order form for courses and a notice.; 4 leaves; DF 861Archives and Manuscripts